{"title":"Aquarium CO2 Diffusers","description":"\u003cp data-start=\"140\" data-end=\"499\" style=\"text-align: center;\"\u003e\u003cstrong data-start=\"140\" data-end=\"201\"\u003eDiscover Our Range of CO2 Diffusers for Planted Aquariums\u003c\/strong\u003e\u003cbr data-start=\"201\" data-end=\"204\"\u003eAchieve lush, vibrant aquatic plant growth with our expertly selected CO2 diffusers. Whether you keep a nano tank or a high-tech aquascape, our collection includes acrylic, glass, ceramic, and pollen-style CO2 diffusers designed to efficiently dissolve carbon dioxide for maximum plant uptake.\u003c\/p\u003e\n\u003cp data-start=\"501\" data-end=\"792\" style=\"text-align: center;\"\u003eFrom sleek low-profile models to high-capacity options for larger tanks, each diffuser is built to deliver a fine mist of CO2—helping your aquatic plants thrive while keeping your setup clean and organised. Compatible with standard CO2 tubing, our range supports tanks from 10 to 250 litres.\u003c\/p\u003e\n\u003cp data-start=\"794\" data-end=\"910\" style=\"text-align: center;\"\u003eExplore trusted options from Castle Dawn Aquatics and beyond, ideal for beginners and experienced aquascapers alike.\u003c\/p\u003e","products":[{"product_id":"external-diffusion-barrel-carbon-dioxide-refiner-atomizer","title":"External CO2 Atomiser with Locking Bolt Seal – Ultra-Fine Ceramic Diffuser","description":"\u003cp data-end=\"562\" data-start=\"248\"\u003eThe Castle Dawn Aquatics External CO2 Atomiser delivers a powerful and secure method of diffusing CO₂ into your aquarium. Designed for use with high-pressure CO₂ systems, this pro-grade atomiser uses a high-density ceramic tube to create ultra-fine bubbles, ensuring maximum dispersion throughout the water column.\u003c\/p\u003e\n\u003cp data-end=\"975\" data-start=\"564\"\u003eIts robust locking bolt mechanism provides a tight, leak-proof seal, even under high pressure, making it a reliable choice for aquascaping setups. Available in two sizes (M1 for 16\/22 mm tubing and M2 for 12\/16 mm tubing), this external diffuser connects securely to your CO₂ line and remains outside the tank for a cleaner aesthetic. Includes a 1‑Year Warranty as a mark of our confidence in its build quality.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features and Important Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-end=\"1133\" data-start=\"1016\"\u003e\n\u003cstrong data-end=\"1036\" data-start=\"1016\"\u003eWhat’s Included:\u003c\/strong\u003e\u003cbr data-end=\"1039\" data-start=\"1036\"\u003e– 1 × External CO2 Atomiser (Choose M1 or M2 Size)\u003cbr data-end=\"1092\" data-start=\"1089\"\u003e⚠️ CO₂ tubing and regulator not included.\u003c\/li\u003e\n\u003cli data-end=\"1278\" data-start=\"1135\"\u003e\n\u003cstrong data-end=\"1144\" data-start=\"1135\"\u003eSize:\u003c\/strong\u003e\u003cbr data-end=\"1147\" data-start=\"1144\"\u003eM1 – 11.2 × 3.5 × 2.8 cm (H × L × W) – 4.41 × 1.38 × 1.10 inches\u003cbr data-end=\"1214\" data-start=\"1211\"\u003eM2 – 13.5 × 3.5 × 2.8 cm (H × L × W) – 5.31 × 1.38 × 1.10 inches\u003c\/li\u003e\n\u003cli data-end=\"1355\" data-start=\"1280\"\u003e\n\u003cstrong data-end=\"1303\" data-start=\"1280\"\u003eHose Compatibility:\u003c\/strong\u003e\u003cbr data-end=\"1306\" data-start=\"1303\"\u003eM1 fits 16\/22 mm tubing; M2 fits 12\/16 mm tubing.\u003c\/li\u003e\n\u003cli data-end=\"1461\" data-start=\"1357\"\u003e\n\u003cstrong data-end=\"1382\" data-start=\"1357\"\u003eUltra-Fine Diffusion:\u003c\/strong\u003e\u003cbr data-end=\"1385\" data-start=\"1382\"\u003eHigh-density ceramic tube creates microbubbles for excellent CO₂ absorption.\u003c\/li\u003e\n\u003cli data-end=\"1559\" data-start=\"1463\"\u003e\n\u003cstrong data-end=\"1484\" data-start=\"1463\"\u003eSecure Bolt Lock:\u003c\/strong\u003e\u003cbr data-end=\"1487\" data-start=\"1484\"\u003eTight-sealing lock and bolt mechanism prevents gas leaks under pressure.\u003c\/li\u003e\n\u003cli data-end=\"1639\" data-start=\"1561\"\u003e\n\u003cstrong data-end=\"1580\" data-start=\"1561\"\u003eExternal Setup:\u003c\/strong\u003e\u003cbr data-end=\"1583\" data-start=\"1580\"\u003eInstalls outside the tank to keep equipment out of view.\u003c\/li\u003e\n\u003cli data-end=\"1735\" data-start=\"1641\"\u003e\n\u003cstrong data-end=\"1661\" data-start=\"1641\"\u003eBreak-In Period:\u003c\/strong\u003e\u003cbr data-end=\"1664\" data-start=\"1661\"\u003eRuns best after 48 hours of use when the membrane reaches peak performance.\u003c\/li\u003e\n\u003cli data-end=\"1781\" data-start=\"1737\"\u003e\n\u003cstrong data-end=\"1750\" data-start=\"1737\"\u003eWarranty:\u003c\/strong\u003e\u003cbr data-end=\"1753\" data-start=\"1750\"\u003e1‑Year Warranty (T\u0026amp;Cs apply)\u003c\/li\u003e\n\u003cli data-end=\"1879\" data-start=\"1783\"\u003e\n\u003cstrong data-end=\"1809\" data-start=\"1783\"\u003eSpare Parts Available:\u003c\/strong\u003e\u003cbr data-end=\"1812\" data-start=\"1809\"\u003eReplacement ceramic tubes sold separately – message us for details.\u003c\/li\u003e\n\u003cli data-end=\"2102\" data-start=\"1881\"\u003e⚠️ \u003cstrong data-end=\"1896\" data-start=\"1884\"\u003eWarning:\u003c\/strong\u003e Beware of cheap CO₂ accessories sold on large e-commerce platforms. Many lack proper pressure handling and may pose serious safety risks. Read more on our blog about the dangers of low-grade manufacturing.\u003c\/li\u003e\n\u003cli data-end=\"2280\" data-start=\"2104\"\u003e⚠️ \u003cstrong data-end=\"2129\" data-start=\"2107\"\u003eCounterfeit Alert:\u003c\/strong\u003e Due to its popularity, fake versions made with unsafe materials are being sold. These imitations may fail under pressure and harm your aquarium setup.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castle Dawn Aquatics","offers":[{"title":"M1 12\/16MM  External Diffusion Barrel","offer_id":29534093705286,"sku":"000027A","price":27.99,"currency_code":"USD","in_stock":true},{"title":"M2 16\/22mm  External Diffusion Barrel","offer_id":29534093738054,"sku":"000026A","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/products\/external-diffusion-barrel-carbon-dioxide-refiner-atomizer-castle-dawn-aquatics-356043.jpg?v=1623339479"},{"product_id":"external-co2-diffuser-aluminium-alloy-atomizer-diffuser-with-bubble-counter","title":"Inline CO2 Diffuser with Nano Mist Membrane, Bubble Counter \u0026 Check Valve – 12\/16mm Hose","description":"\u003cp data-start=\"320\" data-end=\"698\"\u003eThe Castle Dawn Aquatics Inline CO2 Diffuser offers a professional-grade solution for optimising CO₂ delivery in planted aquariums. Using nano mist membrane technology, it produces ultra-fine bubbles for maximum saturation, improving CO₂ absorption and enhancing plant growth. Mounted inline to your filter hose, it keeps equipment out of sight for a cleaner aquarium aesthetic.\u003c\/p\u003e\n\u003cp data-start=\"700\" data-end=\"1028\"\u003eCrafted with a durable metal body and clear acrylic bubble counter, this diffuser includes a replaceable ceramic disc, a built-in check valve, and an anti-lock mechanism to ensure safe, consistent performance. Designed for 12\/16mm (1\/2” or 5\/8”) hoses, it requires a pressurised CO₂ system with a working pressure of at least 30 psi.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eKey Features and Important Notes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1069\" data-end=\"1178\"\u003e\n\u003cstrong data-start=\"1069\" data-end=\"1089\"\u003eWhat’s Included:\u003c\/strong\u003e\u003cbr data-start=\"1089\" data-end=\"1092\"\u003e– 1 × Inline CO2 Diffuser with Bubble Counter\u003cbr data-start=\"1137\" data-end=\"1140\"\u003e⚠️ Tubing and CO₂ system not included.\u003c\/li\u003e\n\u003cli data-start=\"1180\" data-end=\"1284\"\u003e\n\u003cstrong data-start=\"1180\" data-end=\"1205\"\u003eNano Mist Technology:\u003c\/strong\u003e\u003cbr data-start=\"1205\" data-end=\"1208\"\u003eSpecial membrane produces microbubbles that dissolve quickly into the water.\u003c\/li\u003e\n\u003cli data-start=\"1286\" data-end=\"1383\"\u003e\n\u003cstrong data-start=\"1286\" data-end=\"1315\"\u003eProfessional Performance:\u003c\/strong\u003e\u003cbr data-start=\"1315\" data-end=\"1318\"\u003eRequires minimum 30 psi working pressure for effective diffusion.\u003c\/li\u003e\n\u003cli data-start=\"1385\" data-end=\"1481\"\u003e\n\u003cstrong data-start=\"1385\" data-end=\"1406\"\u003eReplaceable Disc:\u003c\/strong\u003e\u003cbr data-start=\"1406\" data-end=\"1409\"\u003eCeramic membrane can be replaced for long-term use and fine mist output.\u003c\/li\u003e\n\u003cli data-start=\"1483\" data-end=\"1587\"\u003e\n\u003cstrong data-start=\"1483\" data-end=\"1508\"\u003eDurable Construction:\u003c\/strong\u003e\u003cbr data-start=\"1508\" data-end=\"1511\"\u003eCrack-resistant metal body and acrylic bubble counter built for reliability.\u003c\/li\u003e\n\u003cli data-start=\"1589\" data-end=\"1692\"\u003e\n\u003cstrong data-start=\"1589\" data-end=\"1611\"\u003eExternal Mounting:\u003c\/strong\u003e\u003cbr data-start=\"1611\" data-end=\"1614\"\u003eReduces algae growth on the disc and keeps equipment out of your display tank.\u003c\/li\u003e\n\u003cli data-start=\"1694\" data-end=\"1788\"\u003e\n\u003cstrong data-start=\"1694\" data-end=\"1716\"\u003eBuilt-in Features:\u003c\/strong\u003e\u003cbr data-start=\"1716\" data-end=\"1719\"\u003eIncludes a check valve and bubble counter to simplify CO₂ management.\u003c\/li\u003e\n\u003cli data-start=\"1790\" data-end=\"1872\"\u003e\n\u003cstrong data-start=\"1790\" data-end=\"1813\"\u003eHose Compatibility:\u003c\/strong\u003e\u003cbr data-start=\"1813\" data-end=\"1816\"\u003eFits standard 1\/2” (12mm) and 5\/8” (16mm) filter tubing.\u003c\/li\u003e\n\u003cli data-start=\"1874\" data-end=\"1943\"\u003e\n\u003cstrong data-start=\"1874\" data-end=\"1883\"\u003eSize:\u003c\/strong\u003e\u003cbr data-start=\"1883\" data-end=\"1886\"\u003e12 × 6.5 × 2.5 cm (H × L × W)\u003cbr data-start=\"1915\" data-end=\"1918\"\u003e4.72 × 2.56 × 0.98 inches\u003c\/li\u003e\n\u003cli data-start=\"1945\" data-end=\"1989\"\u003e\n\u003cstrong data-start=\"1945\" data-end=\"1958\"\u003eWarranty:\u003c\/strong\u003e\u003cbr data-start=\"1958\" data-end=\"1961\"\u003e1‑Year Warranty (T\u0026amp;Cs apply)\u003c\/li\u003e\n\u003cli data-start=\"1991\" data-end=\"2223\"\u003e⚠️ \u003cstrong data-start=\"1994\" data-end=\"2014\"\u003eImportant Notes:\u003c\/strong\u003e\u003cbr data-start=\"2014\" data-end=\"2017\"\u003e– Only use with CO₂ pressure-rated tubing (not silicone).\u003cbr data-start=\"2074\" data-end=\"2077\"\u003e– Bubble counter must be filled with water, not oil-based fluids.\u003cbr data-start=\"2142\" data-end=\"2145\"\u003e– Minimum pressure: 30 psi.\u003cbr data-start=\"2172\" data-end=\"2175\"\u003e– Not suitable for low-pressure DIY CO₂ systems.\u003c\/li\u003e\n\u003cli data-start=\"2225\" data-end=\"2430\"\u003e⚠️ \u003cstrong data-start=\"2228\" data-end=\"2240\"\u003eWarning:\u003c\/strong\u003e Beware of cheap CO₂ accessories sold on major e-commerce platforms. Many lack proper build quality and can pose risks. Check our blog for more on manufacturing differences in aquarium gear.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castle Dawn Aquatics","offers":[{"title":"12mm","offer_id":31424921665614,"sku":"NEW9100-1","price":32.4,"currency_code":"USD","in_stock":true},{"title":"16mm","offer_id":31424921698382,"sku":"NEW9100-2","price":32.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/products\/external-co2-diffuser-aluminium-alloy-atomizer-diffuser-with-bubble-counter-castle-dawn-aquatics-444297.jpg?v=1623339486"},{"product_id":"aquarium-planted-fish-tank-spiral-bubble-counting-co2-diffuser","title":"Spiral Bubble Counting CO2 Diffuser – 30 mm Disc","description":"\u003cp data-start=\"240\" data-end=\"644\"\u003eThe Castle Dawn Aquatics Spiral Bubble Counting Diffuser is designed for planted aquariums ranging from 75 L to 190 L (20 to 50 US gallons). This pollen-style diffuser efficiently disperses CO2 gas with a large 30 mm disc, ensuring optimal CO2 absorption for healthy plant growth. It's built-in spiral bubble counter eliminates the need for a separate bubble counter, simplifying your CO2 injection setup.\u003c\/p\u003e\n\u003cp data-end=\"1305\" data-start=\"1268\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-end=\"1305\" data-start=\"1268\"\u003eKey Features and Important Notes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"690\" data-end=\"814\"\u003e\n\u003cstrong data-start=\"690\" data-end=\"710\"\u003eWhat’s Included:\u003c\/strong\u003e\u003cbr data-start=\"710\" data-end=\"713\"\u003e– 1 × spiral bubble counting diffuser\u003cbr data-start=\"750\" data-end=\"753\"\u003e– 1 × suction cup\u003cbr data-start=\"770\" data-end=\"773\"\u003e⚠️ CO2 tubing and regulator not included.\u003c\/li\u003e\n\u003cli data-start=\"816\" data-end=\"908\"\u003e\n\u003cstrong data-start=\"816\" data-end=\"843\"\u003eSuitable Aquarium Size:\u003c\/strong\u003e\u003cbr data-start=\"843\" data-end=\"846\"\u003eIdeal for aquariums between 75 L and 190 L (20–50 US gallons).\u003c\/li\u003e\n\u003cli data-start=\"910\" data-end=\"1011\"\u003e\n\u003cstrong data-start=\"910\" data-end=\"934\"\u003eLarge Diffuser Disc:\u003c\/strong\u003e\u003cbr data-start=\"934\" data-end=\"937\"\u003e30 mm disc provides a large surface area for efficient CO2 gas dispersion.\u003c\/li\u003e\n\u003cli data-start=\"1013\" data-end=\"1175\"\u003e\n\u003cstrong data-start=\"1013\" data-end=\"1041\"\u003eBuilt-In Bubble Counter:\u003c\/strong\u003e\u003cbr data-start=\"1041\" data-end=\"1044\"\u003eIntegrated spiral bubble counter allows easy monitoring of CO2 injection rates, removing the need for an additional bubble counter.\u003c\/li\u003e\n\u003cli data-start=\"1177\" data-end=\"1261\"\u003e\n\u003cstrong data-start=\"1177\" data-end=\"1193\"\u003eEasy to Use:\u003c\/strong\u003e\u003cbr data-start=\"1193\" data-end=\"1196\"\u003eSimple installation and operation for hassle-free CO2 management.\u003c\/li\u003e\n\u003cli data-start=\"1263\" data-end=\"1336\"\u003e\n\u003cstrong data-start=\"1263\" data-end=\"1288\"\u003eTubing Compatibility:\u003c\/strong\u003e\u003cbr data-start=\"1288\" data-end=\"1291\"\u003eFits standard 6 mm (1\/4 inch) airline tubing.\u003c\/li\u003e\n\u003cli data-start=\"1338\" data-end=\"1417\"\u003e\n\u003cstrong data-start=\"1338\" data-end=\"1351\"\u003eMounting:\u003c\/strong\u003e\u003cbr data-start=\"1351\" data-end=\"1354\"\u003eIncludes suction cup for secure attachment inside the aquarium.\u003c\/li\u003e\n\u003cli data-start=\"1419\" data-end=\"1511\"\u003e\n\u003cstrong data-start=\"1419\" data-end=\"1432\"\u003eUse Case:\u003c\/strong\u003e\u003cbr data-start=\"1432\" data-end=\"1435\"\u003ePerfect for planted aquariums requiring precise and effective CO2 diffusion.\u003c\/li\u003e\n\u003cli data-start=\"1513\" data-end=\"1558\"\u003e\n\u003cstrong data-start=\"1513\" data-end=\"1526\"\u003eWarranty:\u003c\/strong\u003e\u003cbr data-start=\"1526\" data-end=\"1529\"\u003e1‑Year Warranty (\u003cstrong\u003e\u003ca href=\"https:\/\/www.castledawnaquatics.com\/pages\/warranty-terms-conditions\" title=\"WARRANTY TERMS AND CONDITIONS - Castle Dawn Aquatics\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eT\u0026amp;Cs apply\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castle Dawn Aquatics","offers":[{"title":"Default Title","offer_id":51072373227801,"sku":"SKU00147-90","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/files\/CastleDawnAquaticsPlantedAquariumFishTankspiral-bubble-counting-diffuserC.jpg?v=1753165502"},{"product_id":"30-mm-glass-beetle-co2-diffuser-pollen-style-for-high-growth-planted-aquariums-castle-dawn-aquatics","title":"30 mm Glass Beetle CO2 Diffuser","description":"\u003cp data-start=\"223\" data-end=\"642\"\u003eThe Castle Dawn Aquatics 30 mm Glass Beetle CO2 Diffuser is the ideal solution for large or high-growth planted aquariums. Designed to disperse CO2 gas effectively, the large surface area of its 30 mm diffuser disc ensures fine mist-like bubbles for optimal absorption. Crafted from clear glass, this pollen-style diffuser blends seamlessly into any aquascape and is compatible with standard 6 mm (1\/4 inch) CO2 tubing.\u003c\/p\u003e\n\u003cp data-start=\"1268\" data-end=\"1305\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-start=\"1268\" data-end=\"1305\"\u003eKey Features and Important Notes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"688\" data-end=\"809\"\u003e\n\u003cstrong data-start=\"688\" data-end=\"708\"\u003eWhat’s Included:\u003c\/strong\u003e\u003cbr data-start=\"708\" data-end=\"711\"\u003e– 1 × 30 mm glass beetle diffuser\u003cbr data-start=\"744\" data-end=\"747\"\u003e– 2 × suction cups\u003cbr data-start=\"765\" data-end=\"768\"\u003e⚠️ CO2 tubing and regulator not included.\u003c\/li\u003e\n\u003cli data-start=\"811\" data-end=\"901\"\u003e\n\u003cstrong data-start=\"811\" data-end=\"838\"\u003eSuitable Aquarium Size:\u003c\/strong\u003e\u003cbr data-start=\"838\" data-end=\"841\"\u003ePerfect for aquariums from 75 L to 190 L (20–50 US gallons).\u003c\/li\u003e\n\u003cli data-start=\"903\" data-end=\"1005\"\u003e\n\u003cstrong data-start=\"903\" data-end=\"930\"\u003ePollen-Style Diffusion:\u003c\/strong\u003e\u003cbr data-start=\"930\" data-end=\"933\"\u003eProduces ultra-fine bubbles for maximum CO2 absorption and plant health.\u003c\/li\u003e\n\u003cli data-start=\"1007\" data-end=\"1098\"\u003e\n\u003cstrong data-start=\"1007\" data-end=\"1031\"\u003eLarge Diffuser Disc:\u003c\/strong\u003e\u003cbr data-start=\"1031\" data-end=\"1034\"\u003e30 mm ceramic disc allows for the diffusion of high CO2 volumes.\u003c\/li\u003e\n\u003cli data-start=\"1100\" data-end=\"1198\"\u003e\n\u003cstrong data-start=\"1100\" data-end=\"1126\"\u003eDiscreet Glass Design:\u003c\/strong\u003e\u003cbr data-start=\"1126\" data-end=\"1129\"\u003eClear, minimalist appearance integrates easily into aquascaped tanks.\u003c\/li\u003e\n\u003cli data-start=\"1200\" data-end=\"1273\"\u003e\n\u003cstrong data-start=\"1200\" data-end=\"1225\"\u003eTubing Compatibility:\u003c\/strong\u003e\u003cbr data-start=\"1225\" data-end=\"1228\"\u003eFits standard 6 mm (1\/4 inch) airline tubing.\u003c\/li\u003e\n\u003cli data-start=\"1275\" data-end=\"1341\"\u003e\n\u003cstrong data-start=\"1275\" data-end=\"1288\"\u003eMounting:\u003c\/strong\u003e\u003cbr data-start=\"1288\" data-end=\"1291\"\u003eIncludes suction cups for easy, secure attachment.\u003c\/li\u003e\n\u003cli data-start=\"1343\" data-end=\"1388\"\u003e\n\u003cstrong data-start=\"1343\" data-end=\"1356\"\u003eWarranty:\u003c\/strong\u003e\u003cbr data-start=\"1356\" data-end=\"1359\"\u003e1‑Year Warranty (\u003cstrong\u003e\u003ca href=\"https:\/\/www.castledawnaquatics.com\/pages\/warranty-terms-conditions\" title=\"WARRANTY TERMS AND CONDITIONS - Castle Dawn Aquatics\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eT\u0026amp;Cs apply\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castle Dawn Aquatics","offers":[{"title":"Default Title","offer_id":51072635044121,"sku":"SKU00147-91","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/files\/30mmGlassBeetleCO2Diffuser_PollenStyleforHigh-GrowthPlantedAquariumCastleDawnAquatics.jpg?v=1753172997"},{"product_id":"27-mm-glass-beetle-co2-diffuser-pollen-style-for-high-growth-planted-aquarium-castle-dawn-aquatics","title":"27 mm Glass Beetle CO2 Diffuser","description":"\u003cp data-end=\"642\" data-start=\"223\"\u003eThe Castle Dawn Aquatics 27 mm Glass Beetle CO2 Diffuser is the ideal solution for large or high-growth planted aquariums. Designed to disperse CO2 gas effectively, the large surface area of its 27 mm diffuser disc ensures fine mist-like bubbles for optimal absorption. Crafted from clear glass, this pollen-style diffuser blends seamlessly into any aquascape and is compatible with standard 6 mm (1\/4 inch) CO2 tubing.\u003c\/p\u003e\n\u003cp data-end=\"1305\" data-start=\"1268\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-end=\"1305\" data-start=\"1268\"\u003eKey Features and Important Notes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-end=\"809\" data-start=\"688\"\u003e\n\u003cstrong data-end=\"708\" data-start=\"688\"\u003eWhat’s Included:\u003c\/strong\u003e\u003cbr data-end=\"711\" data-start=\"708\"\u003e– 1 × 27 mm glass beetle diffuser\u003cbr data-end=\"747\" data-start=\"744\"\u003e– 2 × suction cups\u003cbr data-end=\"768\" data-start=\"765\"\u003e⚠️ CO2 tubing and regulator not included.\u003c\/li\u003e\n\u003cli data-end=\"901\" data-start=\"811\"\u003e\n\u003cstrong data-end=\"838\" data-start=\"811\"\u003eSuitable Aquarium Size:\u003c\/strong\u003e\u003cbr data-end=\"841\" data-start=\"838\"\u003ePerfect for aquariums from 75 L to 190 L (20–50 US gallons).\u003c\/li\u003e\n\u003cli data-end=\"1005\" data-start=\"903\"\u003e\n\u003cstrong data-end=\"930\" data-start=\"903\"\u003ePollen-Style Diffusion:\u003c\/strong\u003e\u003cbr data-end=\"933\" data-start=\"930\"\u003eProduces ultra-fine bubbles for maximum CO2 absorption and plant health.\u003c\/li\u003e\n\u003cli data-end=\"1098\" data-start=\"1007\"\u003e\n\u003cstrong data-end=\"1031\" data-start=\"1007\"\u003eLarge Diffuser Disc:\u003c\/strong\u003e\u003cbr data-end=\"1034\" data-start=\"1031\"\u003e30 mm ceramic disc allows for the diffusion of high CO2 volumes.\u003c\/li\u003e\n\u003cli data-end=\"1198\" data-start=\"1100\"\u003e\n\u003cstrong data-end=\"1126\" data-start=\"1100\"\u003eDiscreet Glass Design:\u003c\/strong\u003e\u003cbr data-end=\"1129\" data-start=\"1126\"\u003eClear, minimalist appearance integrates easily into aquascaped tanks.\u003c\/li\u003e\n\u003cli data-end=\"1273\" data-start=\"1200\"\u003e\n\u003cstrong data-end=\"1225\" data-start=\"1200\"\u003eTubing Compatibility:\u003c\/strong\u003e\u003cbr data-end=\"1228\" data-start=\"1225\"\u003eFits standard 6 mm (1\/4 inch) airline tubing.\u003c\/li\u003e\n\u003cli data-end=\"1341\" data-start=\"1275\"\u003e\n\u003cstrong data-end=\"1288\" data-start=\"1275\"\u003eMounting:\u003c\/strong\u003e\u003cbr data-end=\"1291\" data-start=\"1288\"\u003eIncludes suction cups for easy, secure attachment.\u003c\/li\u003e\n\u003cli data-end=\"1388\" data-start=\"1343\"\u003e\n\u003cstrong data-end=\"1356\" data-start=\"1343\"\u003eWarranty:\u003c\/strong\u003e\u003cbr data-end=\"1359\" data-start=\"1356\"\u003e1‑Year Warranty (\u003cstrong\u003e\u003ca title=\"WARRANTY TERMS AND CONDITIONS - Castle Dawn Aquatics\" href=\"https:\/\/www.castledawnaquatics.com\/pages\/warranty-terms-conditions\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eT\u0026amp;Cs apply\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castle Dawn Aquatics","offers":[{"title":"Default Title","offer_id":51072668270873,"sku":"SKU00147-92","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/files\/27mmGlassBeetleCO2Diffuser_PollenStyleforHigh-GrowthPlantedAquariumCastleDawnAquatics.jpg?v=1753173811"},{"product_id":"castle-dawn-aquatics-curved-special-co2-diffuser-14cm-nano-acrylic-diffuser-for-shallow-tanks","title":"Curved Special CO2 14cm Nano Acrylic Diffuser","description":"\u003cp data-start=\"228\" data-end=\"622\"\u003eThe Castle Dawn Aquatics Curved Special CO2 Diffuser is designed for aquascapers who want maximum performance in a compact form. With a slim profile and side-mounted tubing connection, this acrylic diffuser easily hangs over the tank edge, offering a hose-free layout. Ideal for nano and shallow tanks, it produces a fine CO2 mist to boost plant growth without disrupting your aquascape design.\u003c\/p\u003e\n\u003cp data-start=\"1268\" data-end=\"1305\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-start=\"1268\" data-end=\"1305\"\u003eKey Features and Important Notes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"737\" data-end=\"853\"\u003e\n\u003cstrong data-start=\"737\" data-end=\"757\"\u003eWhat’s Included:\u003c\/strong\u003e\u003cbr data-start=\"757\" data-end=\"760\"\u003e– 1 × Castle Dawn Aquatics Curved Special CO2 Diffuser\u003cbr data-start=\"814\" data-end=\"817\"\u003e⚠️ CO2 tubing and pump not included.\u003c\/li\u003e\n\u003cli data-start=\"855\" data-end=\"940\"\u003e\n\u003cstrong data-start=\"855\" data-end=\"880\"\u003eUltra-Compact Design:\u003c\/strong\u003e\u003cbr data-start=\"880\" data-end=\"883\"\u003eJust 15 cm long – perfect for nano and shallow aquariums.\u003c\/li\u003e\n\u003cli data-start=\"942\" data-end=\"1039\"\u003e\n\u003cstrong data-start=\"942\" data-end=\"967\"\u003eSide Pipe Connection:\u003c\/strong\u003e\u003cbr data-start=\"967\" data-end=\"970\"\u003eKeeps tubing discreet and organised for a clean, clutter-free layout.\u003c\/li\u003e\n\u003cli data-start=\"1041\" data-end=\"1130\"\u003e\n\u003cstrong data-start=\"1041\" data-end=\"1059\"\u003eFine CO2 Mist:\u003c\/strong\u003e\u003cbr data-start=\"1059\" data-end=\"1062\"\u003eDelivers a consistent, ultra-fine CO2 spray to enhance plant growth.\u003c\/li\u003e\n\u003cli data-start=\"1132\" data-end=\"1223\"\u003e\n\u003cstrong data-start=\"1132\" data-end=\"1155\"\u003eEasy Tank Mounting:\u003c\/strong\u003e\u003cbr data-start=\"1155\" data-end=\"1158\"\u003eHangs neatly over the edge of your aquarium for effortless setup.\u003c\/li\u003e\n\u003cli data-start=\"1225\" data-end=\"1314\"\u003e\n\u003cstrong data-start=\"1225\" data-end=\"1251\"\u003eDurable Acrylic Build:\u003c\/strong\u003e\u003cbr data-start=\"1251\" data-end=\"1254\"\u003eLightweight and shatter-resistant compared to glass options.\u003c\/li\u003e\n\u003cli data-start=\"1316\" data-end=\"1489\"\u003e\n\u003cstrong data-start=\"1316\" data-end=\"1347\"\u003ePrecise Fit \u0026amp; Measurements:\u003c\/strong\u003e\u003cbr data-start=\"1347\" data-end=\"1350\"\u003eFits standard 4\/6 mm CO2 tubing. Membrane diameter: 12 mm. Clip width: 6 mm.\u003cbr data-start=\"1335\" data-end=\"1338\"\u003eHeight: 14 cm × Width: 3.9 cm (5.51 × 1.54 inches).\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1316\" data-end=\"1489\"\u003e\n\u003cstrong data-end=\"1260\" data-start=\"1247\"\u003eWarranty:\u003c\/strong\u003e\u003cbr data-end=\"1263\" data-start=\"1260\"\u003e1‑Year Warranty (\u003cstrong\u003e\u003ca title=\"WARRANTY TERMS AND CONDITIONS - Castle Dawn Aquatics\" href=\"https:\/\/www.castledawnaquatics.com\/pages\/warranty-terms-conditions\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eT\u0026amp;Cs apply\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castle Dawn Aquatics","offers":[{"title":"Default Title","offer_id":51074919268633,"sku":"SKU00147-93","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/files\/CastleDawnAquaticsCurvedSpecialCO2DiffuserNanoAcrylicDiffuserforShallowTanks14cm.jpg?v=1753230143"},{"product_id":"castle-dawn-aquatics-curved-special-co2-diffuser-nano-acrylic-co2-diffuser-planted-aquarium","title":"Curved Nano Medium Acrylic 20cm CO2 Diffuser","description":"\u003cp data-start=\"263\" data-end=\"673\"\u003eThe Castle Dawn Aquatics Curved Special CO2 Diffuser (Medium) is designed for aquascapers seeking a clean, hose-free layout in medium to large aquariums. Featuring a slim vertical profile, the diffuser hangs neatly over the edge of your tank with the CO2 tubing connection placed to the side for a more organised setup. Its wide membrane ensures a fine CO2 mist, promoting healthy aquatic plant growth in style.\u003c\/p\u003e\n\u003cp data-end=\"1305\" data-start=\"1268\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-end=\"1305\" data-start=\"1268\"\u003eKey Features and Important Notes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"719\" data-end=\"848\"\u003e\n\u003cstrong data-start=\"719\" data-end=\"739\"\u003eWhat’s Included:\u003c\/strong\u003e\u003cbr data-start=\"739\" data-end=\"742\"\u003e– 1 × Castle Dawn Aquatics Curved Special CO2 Diffuser (Large)\u003cbr data-start=\"804\" data-end=\"807\"\u003e⚠️ CO2 tubing and regulator not included.\u003c\/li\u003e\n\u003cli data-start=\"850\" data-end=\"963\"\u003e\n\u003cstrong data-start=\"850\" data-end=\"875\"\u003eSlim Vertical Design:\u003c\/strong\u003e\u003cbr data-start=\"875\" data-end=\"878\"\u003eEspecially narrow diffuser body height with a side-mounted pipe for easy integration.\u003c\/li\u003e\n\u003cli data-start=\"965\" data-end=\"1076\"\u003e\n\u003cstrong data-start=\"965\" data-end=\"991\"\u003eHang-on-Edge Mounting:\u003c\/strong\u003e\u003cbr data-start=\"991\" data-end=\"994\"\u003eNo suction cups needed – simply hang over the tank edge for a secure, tidy layout.\u003c\/li\u003e\n\u003cli data-start=\"1078\" data-end=\"1181\"\u003e\n\u003cstrong data-start=\"1078\" data-end=\"1096\"\u003eFine CO2 Mist:\u003c\/strong\u003e\u003cbr data-start=\"1096\" data-end=\"1099\"\u003eA wide membrane produces a consistent micro-bubble mist for effective CO2 diffusion.\u003c\/li\u003e\n\u003cli data-start=\"1183\" data-end=\"1276\"\u003e\n\u003cstrong data-start=\"1183\" data-end=\"1208\"\u003eSide Pipe Connection:\u003c\/strong\u003e\u003cbr data-start=\"1208\" data-end=\"1211\"\u003eKeeps tubing discreet and layout clean – perfect for aquascaping.\u003c\/li\u003e\n\u003cli data-start=\"1278\" data-end=\"1393\"\u003e\n\u003cstrong data-start=\"1278\" data-end=\"1311\"\u003eDurable Acrylic Construction:\u003c\/strong\u003e\u003cbr data-start=\"1311\" data-end=\"1314\"\u003eMade from clear, lightweight acrylic – shatter-resistant and low visual impact.\u003c\/li\u003e\n\u003cli data-start=\"1395\" data-end=\"1571\"\u003e\n\u003cstrong data-start=\"1395\" data-end=\"1428\"\u003ePrecision Fit \u0026amp; Measurements:\u003c\/strong\u003e\u003cbr data-start=\"1428\" data-end=\"1431\"\u003eFits standard 4\/6 mm CO2 tubing. Membrane diameter: 17 mm. Clip width: 9 mm.\u003cbr data-start=\"1507\" data-end=\"1510\"\u003eHeight: 20 cm × Width: 4.3 cm (7.87 × 1.69 inches)\u003c\/li\u003e\n\u003cli data-start=\"1573\" data-end=\"1618\"\u003e\n\u003cstrong data-start=\"1573\" data-end=\"1586\"\u003eWarranty:\u003c\/strong\u003e\u003cbr data-start=\"1586\" data-end=\"1589\"\u003e1‑Year Warranty (\u003cstrong\u003e\u003ca href=\"https:\/\/www.castledawnaquatics.com\/pages\/warranty-terms-conditions\" title=\"WARRANTY TERMS AND CONDITIONS - Castle Dawn Aquatics\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eT\u0026amp;Cs apply\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castle Dawn Aquatics","offers":[{"title":"Default Title","offer_id":51075030515993,"sku":"SKU00147-94","price":25.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/files\/Castle_Dawn_Aquatics_Curved_Special_CO2_Diffuser_Nano_Acrylic_Diffuser_for_Shallow_Tanks_20cm.jpg?v=1753231739"},{"product_id":"castle-dawn-aquatics-curved-25cm-special-co2-diffuser-large-acrylic-diffuser-with-side-connection","title":"Curved Nano Large Acrylic 25cm CO2 Diffuser","description":"\u003cp data-end=\"673\" data-start=\"263\"\u003eThe Castle Dawn Aquatics Curved Special CO2 Diffuser (Large) is designed for aquascapers seeking a clean, hose-free layout in medium to large aquariums. Featuring a slim vertical profile, the diffuser hangs neatly over the edge of your tank with the CO2 tubing connection placed to the side for a more organised setup. Its wide membrane ensures a fine CO2 mist, promoting healthy aquatic plant growth in style.\u003c\/p\u003e\n\u003cp data-start=\"1268\" data-end=\"1305\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-start=\"1268\" data-end=\"1305\"\u003eKey Features and Important Notes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-end=\"848\" data-start=\"719\"\u003e\n\u003cstrong data-end=\"739\" data-start=\"719\"\u003eWhat’s Included:\u003c\/strong\u003e\u003cbr data-end=\"742\" data-start=\"739\"\u003e– 1 × Castle Dawn Aquatics Curved Special CO2 Diffuser (Large)\u003cbr data-end=\"807\" data-start=\"804\"\u003e⚠️ CO2 tubing and regulator not included.\u003c\/li\u003e\n\u003cli data-end=\"963\" data-start=\"850\"\u003e\n\u003cstrong data-end=\"875\" data-start=\"850\"\u003eSlim Vertical Design:\u003c\/strong\u003e\u003cbr data-end=\"878\" data-start=\"875\"\u003eEspecially narrow diffuser body height with a side-mounted pipe for easy integration.\u003c\/li\u003e\n\u003cli data-end=\"1076\" data-start=\"965\"\u003e\n\u003cstrong data-end=\"991\" data-start=\"965\"\u003eHang-on-Edge Mounting:\u003c\/strong\u003e\u003cbr data-end=\"994\" data-start=\"991\"\u003eNo suction cups needed – simply hang over the tank edge for a secure, tidy layout.\u003c\/li\u003e\n\u003cli data-end=\"1181\" data-start=\"1078\"\u003e\n\u003cstrong data-end=\"1096\" data-start=\"1078\"\u003eFine CO2 Mist:\u003c\/strong\u003e\u003cbr data-end=\"1099\" data-start=\"1096\"\u003eA wide membrane produces a consistent micro-bubble mist for effective CO2 diffusion.\u003c\/li\u003e\n\u003cli data-end=\"1276\" data-start=\"1183\"\u003e\n\u003cstrong data-end=\"1208\" data-start=\"1183\"\u003eSide Pipe Connection:\u003c\/strong\u003e\u003cbr data-end=\"1211\" data-start=\"1208\"\u003eKeeps tubing discreet and layout clean – perfect for aquascaping.\u003c\/li\u003e\n\u003cli data-end=\"1393\" data-start=\"1278\"\u003e\n\u003cstrong data-end=\"1311\" data-start=\"1278\"\u003eDurable Acrylic Construction:\u003c\/strong\u003e\u003cbr data-end=\"1314\" data-start=\"1311\"\u003eMade from clear, lightweight acrylic – shatter-resistant and low visual impact.\u003c\/li\u003e\n\u003cli data-end=\"1571\" data-start=\"1395\"\u003e\n\u003cstrong data-end=\"1428\" data-start=\"1395\"\u003ePrecision Fit \u0026amp; Measurements:\u003c\/strong\u003e\u003cbr data-end=\"1431\" data-start=\"1428\"\u003eFits standard 4\/6 mm CO2 tubing. Membrane diameter: 17 mm. Clip width: 9 mm.\u003cbr data-end=\"1510\" data-start=\"1507\"\u003eHeight: 25 cm × Width: 4.3 cm (9.84 × 1.69 inches)\u003c\/li\u003e\n\u003cli data-end=\"1618\" data-start=\"1573\"\u003e\n\u003cstrong data-end=\"1586\" data-start=\"1573\"\u003eWarranty:\u003c\/strong\u003e\u003cbr data-end=\"1589\" data-start=\"1586\"\u003e1‑Year Warranty (\u003cstrong\u003e\u003ca title=\"WARRANTY TERMS AND CONDITIONS - Castle Dawn Aquatics\" href=\"https:\/\/www.castledawnaquatics.com\/pages\/warranty-terms-conditions\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eT\u0026amp;Cs apply\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castle Dawn Aquatics","offers":[{"title":"Default Title","offer_id":51075079045401,"sku":"SKU00147-95","price":27.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/files\/Castle_Dawn_Aquatics_Curved_Special_CO2_Diffuser_Nano_Acrylic_Diffuser_for_Shallow_Tanks_25cm.jpg?v=1753232317"},{"product_id":"castle-dawn-aquatics-acrylic-co2-diffuser-large-25-mm-for-planted-aquariums-up-to-250l","title":"Acrylic CO2 Diffuser – Large (25 mm Ceramic Disc)","description":"\u003cp data-end=\"618\" data-start=\"243\"\u003eThe Castle Dawn Aquatics Acrylic CO2 Diffuser offers superior micro-bubble diffusion for planted aquariums. Designed with advanced micro-porous ceramic technology, it produces finer bubbles than traditional glass diffusers, allowing CO2 to dissolve more efficiently in the water. Made from clear, durable acrylic, it’s less prone to breakage during cleaning or repositioning.\u003c\/p\u003e\n\u003cp data-end=\"742\" data-start=\"620\"\u003eThis diffuser is ideal for aquariums up to 250 litres and features a large 25 mm ceramic disc for enhanced gas dispersion.\u003c\/p\u003e\n\u003cp data-start=\"1268\" data-end=\"1305\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-start=\"1268\" data-end=\"1305\"\u003eKey Features and Important Notes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-end=\"918\" data-start=\"788\"\u003e\n\u003cstrong data-end=\"808\" data-start=\"788\"\u003eWhat’s Included:\u003c\/strong\u003e\u003cbr data-end=\"811\" data-start=\"808\"\u003e– 1 × Castle Dawn Aquatics Acrylic CO2 Diffuser (Large – 25 mm)\u003cbr data-end=\"877\" data-start=\"874\"\u003e⚠️ CO2 tubing and regulator not included.\u003c\/li\u003e\n\u003cli data-end=\"1031\" data-start=\"920\"\u003e\n\u003cstrong data-end=\"948\" data-start=\"920\"\u003eMicro-Bubble Technology:\u003c\/strong\u003e\u003cbr data-end=\"951\" data-start=\"948\"\u003eGenerates finer bubbles than standard glass diffusers for better CO2 absorption.\u003c\/li\u003e\n\u003cli data-end=\"1134\" data-start=\"1033\"\u003e\n\u003cstrong data-end=\"1059\" data-start=\"1033\"\u003eDurable Acrylic Build:\u003c\/strong\u003e\u003cbr data-end=\"1062\" data-start=\"1059\"\u003eLess fragile than glass – easy to clean and reposition without cracking.\u003c\/li\u003e\n\u003cli data-end=\"1236\" data-start=\"1136\"\u003e\n\u003cstrong data-end=\"1165\" data-start=\"1136\"\u003eSelf-Cleaning Resistance:\u003c\/strong\u003e\u003cbr data-end=\"1168\" data-start=\"1165\"\u003eMicro-porous ceramic disc resists clogging and stays cleaner longer.\u003c\/li\u003e\n\u003cli data-end=\"1339\" data-start=\"1238\"\u003e\n\u003cstrong data-end=\"1259\" data-start=\"1238\"\u003eEasy Maintenance:\u003c\/strong\u003e\u003cbr data-end=\"1262\" data-start=\"1259\"\u003eSoak in a water and bleach solution (10 mins monthly) to restore performance.\u003c\/li\u003e\n\u003cli data-end=\"1443\" data-start=\"1341\"\u003e\n\u003cstrong data-end=\"1357\" data-start=\"1341\"\u003ePre-Use Tip:\u003c\/strong\u003e\u003cbr data-end=\"1360\" data-start=\"1357\"\u003eSoak the diffuser in water for 30 minutes before first use for optimal mist output.\u003c\/li\u003e\n\u003cli data-end=\"1515\" data-start=\"1445\"\u003e\n\u003cstrong data-end=\"1472\" data-start=\"1445\"\u003eIdeal for Larger Tanks:\u003c\/strong\u003e\u003cbr data-end=\"1475\" data-start=\"1472\"\u003eSuitable for aquariums up to 250 litres.\u003c\/li\u003e\n\u003cli data-end=\"1616\" data-start=\"1517\"\u003e\n\u003cstrong data-end=\"1526\" data-start=\"1517\"\u003eSize:\u003c\/strong\u003e Ceramic disc diameter: 2.5 cm (0.98 inches)\u003cbr data-end=\"1573\" data-start=\"1570\"\u003e\u003cstrong data-end=\"1586\" data-start=\"1573\"\u003eWarranty:\u003c\/strong\u003e 1‑Year Warranty (\u003cstrong\u003e\u003ca title=\"WARRANTY TERMS AND CONDITIONS - Castle Dawn Aquatics\" href=\"https:\/\/www.castledawnaquatics.com\/pages\/warranty-terms-conditions\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eT\u0026amp;Cs apply\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e).\u003c\/li\u003e\n\u003cli data-end=\"1843\" data-start=\"1618\"\u003e⚠️ \u003cstrong data-end=\"1633\" data-start=\"1621\"\u003eWarning:\u003c\/strong\u003e Beware of cheaply made diffusers sold on low-cost apps like Temu. These are often made from non-aquatic safe materials, clog easily, break quickly, and can harm your aquarium setup.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castle Dawn Aquatics","offers":[{"title":"Default Title","offer_id":51075160539417,"sku":"SKU00148-96","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/files\/CastleDawnAquaticsCO2DiffuserNanoAcrylicDiffuserforPlantedAquariumFishTanks25cm.jpg?v=1753233923"},{"product_id":"castle-dawn-aquatics-19cm-co2-diffuser-medium-acrylic-diffuser-planted-aquarium-fish-tank","title":"Acrylic CO2 Diffuser – Medium (19 mm Ceramic Disc)","description":"\u003cp data-start=\"243\" data-end=\"618\"\u003eThe Castle Dawn Aquatics Acrylic CO2 Diffuser offers superior micro-bubble diffusion for planted aquariums. Designed with advanced micro-porous ceramic technology, it produces finer bubbles than traditional glass diffusers, allowing CO2 to dissolve more efficiently in the water. Made from clear, durable acrylic, it’s less prone to breakage during cleaning or repositioning.\u003c\/p\u003e\n\u003cp data-start=\"620\" data-end=\"742\"\u003eThis diffuser is ideal for aquariums up to 120 litres and features a Medium 19 mm ceramic disc for enhanced gas dispersion.\u003c\/p\u003e\n\u003cp data-end=\"1305\" data-start=\"1268\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-end=\"1305\" data-start=\"1268\"\u003eKey Features and Important Notes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"788\" data-end=\"918\"\u003e\n\u003cstrong data-start=\"788\" data-end=\"808\"\u003eWhat’s Included:\u003c\/strong\u003e\u003cbr data-start=\"808\" data-end=\"811\"\u003e– 1 × Castle Dawn Aquatics Acrylic CO2 Diffuser (Medium – 19 mm)\u003cbr data-start=\"874\" data-end=\"877\"\u003e⚠️ CO2 tubing and regulator not included.\u003c\/li\u003e\n\u003cli data-start=\"920\" data-end=\"1031\"\u003e\n\u003cstrong data-start=\"920\" data-end=\"948\"\u003eMicro-Bubble Technology:\u003c\/strong\u003e\u003cbr data-start=\"948\" data-end=\"951\"\u003eGenerates finer bubbles than standard glass diffusers for better CO2 absorption.\u003c\/li\u003e\n\u003cli data-start=\"1033\" data-end=\"1134\"\u003e\n\u003cstrong data-start=\"1033\" data-end=\"1059\"\u003eDurable Acrylic Build:\u003c\/strong\u003e\u003cbr data-start=\"1059\" data-end=\"1062\"\u003eLess fragile than glass – easy to clean and reposition without cracking.\u003c\/li\u003e\n\u003cli data-start=\"1136\" data-end=\"1236\"\u003e\n\u003cstrong data-start=\"1136\" data-end=\"1165\"\u003eSelf-Cleaning Resistance:\u003c\/strong\u003e\u003cbr data-start=\"1165\" data-end=\"1168\"\u003eMicro-porous ceramic disc resists clogging and stays cleaner longer.\u003c\/li\u003e\n\u003cli data-start=\"1238\" data-end=\"1339\"\u003e\n\u003cstrong data-start=\"1238\" data-end=\"1259\"\u003eEasy Maintenance:\u003c\/strong\u003e\u003cbr data-start=\"1259\" data-end=\"1262\"\u003eSoak in a water and bleach solution (10 mins monthly) to restore performance.\u003c\/li\u003e\n\u003cli data-start=\"1341\" data-end=\"1443\"\u003e\n\u003cstrong data-start=\"1341\" data-end=\"1357\"\u003ePre-Use Tip:\u003c\/strong\u003e\u003cbr data-start=\"1357\" data-end=\"1360\"\u003eSoak the diffuser in water for 30 minutes before first use for optimal mist output.\u003c\/li\u003e\n\u003cli data-start=\"1445\" data-end=\"1515\"\u003e\n\u003cstrong data-start=\"1445\" data-end=\"1472\"\u003eIdeal for Larger Tanks:\u003c\/strong\u003e\u003cbr data-start=\"1472\" data-end=\"1475\"\u003eSuitable for aquariums up to 120  litres.\u003c\/li\u003e\n\u003cli data-start=\"1517\" data-end=\"1616\"\u003e\n\u003cstrong data-start=\"1517\" data-end=\"1526\"\u003eSize:\u003c\/strong\u003e Ceramic disc diameter: 1.9 cm (0.75 inches)\u003cbr data-start=\"1570\" data-end=\"1573\"\u003e\u003cstrong data-start=\"1573\" data-end=\"1586\"\u003eWarranty:\u003c\/strong\u003e 1‑Year Warranty (\u003cstrong\u003e\u003ca href=\"https:\/\/www.castledawnaquatics.com\/pages\/warranty-terms-conditions\" title=\"WARRANTY TERMS AND CONDITIONS - Castle Dawn Aquatics\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eT\u0026amp;Cs apply\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e).\u003c\/li\u003e\n\u003cli data-start=\"1618\" data-end=\"1843\"\u003e⚠️ \u003cstrong data-start=\"1621\" data-end=\"1633\"\u003eWarning:\u003c\/strong\u003e Beware of cheaply made diffusers sold on low-cost apps like Temu. These are often made from non-aquatic safe materials, clog easily, break quickly, and can harm your aquarium setup.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castle Dawn Aquatics","offers":[{"title":"Default Title","offer_id":51075187966233,"sku":"SKU00147-97","price":17.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/files\/Castle_Dawn_Aquatics_CO2_Diffuser_Nano_Acrylic_Diffuser_for_Planted_Aquarium_Fish_Tanks_19cm.jpg?v=1753234692"},{"product_id":"castle-dawn-aquatics-co2-diffuser-small-acrylic-diffuser-with-side-connection-planted-fish-tank-aquarium","title":"Acrylic CO2 Diffuser – Small (15 mm Ceramic Disc)","description":"\u003cp data-start=\"243\" data-end=\"618\"\u003eThe Castle Dawn Aquatics Acrylic CO2 Diffuser offers superior micro-bubble diffusion for planted aquariums. Designed with advanced micro-porous ceramic technology, it produces finer bubbles than traditional glass diffusers, allowing CO2 to dissolve more efficiently in the water. Made from clear, durable acrylic, it’s less prone to breakage during cleaning or repositioning.\u003c\/p\u003e\n\u003cp data-start=\"620\" data-end=\"742\"\u003eThis diffuser is ideal for aquariums up to 60 litres and features a small 15 mm ceramic disc for enhanced gas dispersion.\u003c\/p\u003e\n\u003cp data-end=\"1305\" data-start=\"1268\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-end=\"1305\" data-start=\"1268\"\u003eKey Features and Important Notes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"788\" data-end=\"918\"\u003e\n\u003cstrong data-start=\"788\" data-end=\"808\"\u003eWhat’s Included:\u003c\/strong\u003e\u003cbr data-start=\"808\" data-end=\"811\"\u003e– 1 × Castle Dawn Aquatics Acrylic CO2 Diffuser (Small – 15 mm)\u003cbr data-start=\"874\" data-end=\"877\"\u003e⚠️ CO2 tubing and regulator not included.\u003c\/li\u003e\n\u003cli data-start=\"920\" data-end=\"1031\"\u003e\n\u003cstrong data-start=\"920\" data-end=\"948\"\u003eMicro-Bubble Technology:\u003c\/strong\u003e\u003cbr data-start=\"948\" data-end=\"951\"\u003eGenerates finer bubbles than standard glass diffusers for better CO2 absorption.\u003c\/li\u003e\n\u003cli data-start=\"1033\" data-end=\"1134\"\u003e\n\u003cstrong data-start=\"1033\" data-end=\"1059\"\u003eDurable Acrylic Build:\u003c\/strong\u003e\u003cbr data-start=\"1059\" data-end=\"1062\"\u003eLess fragile than glass – easy to clean and reposition without cracking.\u003c\/li\u003e\n\u003cli data-start=\"1136\" data-end=\"1236\"\u003e\n\u003cstrong data-start=\"1136\" data-end=\"1165\"\u003eSelf-Cleaning Resistance:\u003c\/strong\u003e\u003cbr data-start=\"1165\" data-end=\"1168\"\u003eMicro-porous ceramic disc resists clogging and stays cleaner longer.\u003c\/li\u003e\n\u003cli data-start=\"1238\" data-end=\"1339\"\u003e\n\u003cstrong data-start=\"1238\" data-end=\"1259\"\u003eEasy Maintenance:\u003c\/strong\u003e\u003cbr data-start=\"1259\" data-end=\"1262\"\u003eSoak in a water and bleach solution (10 mins monthly) to restore performance.\u003c\/li\u003e\n\u003cli data-start=\"1341\" data-end=\"1443\"\u003e\n\u003cstrong data-start=\"1341\" data-end=\"1357\"\u003ePre-Use Tip:\u003c\/strong\u003e\u003cbr data-start=\"1357\" data-end=\"1360\"\u003eSoak the diffuser in water for 30 minutes before first use for optimal mist output.\u003c\/li\u003e\n\u003cli data-start=\"1445\" data-end=\"1515\"\u003e\n\u003cstrong data-start=\"1445\" data-end=\"1472\"\u003eIdeal for Larger Tanks:\u003c\/strong\u003e\u003cbr data-start=\"1472\" data-end=\"1475\"\u003eSuitable for aquariums up to 60  litres.\u003c\/li\u003e\n\u003cli data-start=\"1517\" data-end=\"1616\"\u003e\n\u003cstrong data-start=\"1517\" data-end=\"1526\"\u003eSize:\u003c\/strong\u003e Ceramic disc diameter: 1.5 cm (0.59 inches)\u003cbr data-start=\"1570\" data-end=\"1573\"\u003e\u003cstrong data-start=\"1573\" data-end=\"1586\"\u003eWarranty:\u003c\/strong\u003e 1‑Year Warranty (\u003cstrong\u003e\u003ca href=\"https:\/\/www.castledawnaquatics.com\/pages\/warranty-terms-conditions\" title=\"WARRANTY TERMS AND CONDITIONS - Castle Dawn Aquatics\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eT\u0026amp;Cs apply\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e).\u003c\/li\u003e\n\u003cli data-start=\"1618\" data-end=\"1843\"\u003e⚠️ \u003cstrong data-start=\"1621\" data-end=\"1633\"\u003eWarning:\u003c\/strong\u003e Beware of cheaply made diffusers sold on low-cost apps like Temu. These are often made from non-aquatic safe materials, clog easily, break quickly, and can harm your aquarium setup.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castle Dawn Aquatics","offers":[{"title":"Default Title","offer_id":51075200319769,"sku":"SKU00147-98","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/files\/CastleDawnAquaticsCO2DiffuserNanoAcrylicDiffuserforPlantedAquariumFishTanks15cm.jpg?v=1753235241"},{"product_id":"castle-dawn-aquatics-special-co2-diffuser-nano-acrylic-diffuser-for-planted-nano-aquarium-fish-tanks","title":"Acrylic CO2 Diffuser – Nano (11 mm Ceramic Disc)","description":"\u003cp data-end=\"618\" data-start=\"243\"\u003eThe Castle Dawn Aquatics Acrylic CO2 Diffuser offers superior micro-bubble diffusion for planted aquariums. Designed with advanced micro-porous ceramic technology, it produces finer bubbles than traditional glass diffusers, allowing CO2 to dissolve more efficiently in the water. Made from clear, durable acrylic, it’s less prone to breakage during cleaning or repositioning.\u003c\/p\u003e\n\u003cp data-end=\"742\" data-start=\"620\"\u003eThis diffuser is ideal for aquariums up to 30 litres and features a small 11 mm ceramic disc for enhanced gas dispersion.\u003c\/p\u003e\n\u003cp data-start=\"1268\" data-end=\"1305\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-start=\"1268\" data-end=\"1305\"\u003eKey Features and Important Notes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-end=\"918\" data-start=\"788\"\u003e\n\u003cstrong data-end=\"808\" data-start=\"788\"\u003eWhat’s Included:\u003c\/strong\u003e\u003cbr data-end=\"811\" data-start=\"808\"\u003e– 1 × Castle Dawn Aquatics Acrylic CO2 Diffuser (Nano– 11 mm)\u003cbr data-end=\"877\" data-start=\"874\"\u003e⚠️ CO2 tubing and regulator not included.\u003c\/li\u003e\n\u003cli data-end=\"1031\" data-start=\"920\"\u003e\n\u003cstrong data-end=\"948\" data-start=\"920\"\u003eMicro-Bubble Technology:\u003c\/strong\u003e\u003cbr data-end=\"951\" data-start=\"948\"\u003eGenerates finer bubbles than standard glass diffusers for better CO2 absorption.\u003c\/li\u003e\n\u003cli data-end=\"1134\" data-start=\"1033\"\u003e\n\u003cstrong data-end=\"1059\" data-start=\"1033\"\u003eDurable Acrylic Build:\u003c\/strong\u003e\u003cbr data-end=\"1062\" data-start=\"1059\"\u003eLess fragile than glass – easy to clean and reposition without cracking.\u003c\/li\u003e\n\u003cli data-end=\"1236\" data-start=\"1136\"\u003e\n\u003cstrong data-end=\"1165\" data-start=\"1136\"\u003eSelf-Cleaning Resistance:\u003c\/strong\u003e\u003cbr data-end=\"1168\" data-start=\"1165\"\u003eMicro-porous ceramic disc resists clogging and stays cleaner longer.\u003c\/li\u003e\n\u003cli data-end=\"1339\" data-start=\"1238\"\u003e\n\u003cstrong data-end=\"1259\" data-start=\"1238\"\u003eEasy Maintenance:\u003c\/strong\u003e\u003cbr data-end=\"1262\" data-start=\"1259\"\u003eSoak in a water and bleach solution (10 mins monthly) to restore performance.\u003c\/li\u003e\n\u003cli data-end=\"1443\" data-start=\"1341\"\u003e\n\u003cstrong data-end=\"1357\" data-start=\"1341\"\u003ePre-Use Tip:\u003c\/strong\u003e\u003cbr data-end=\"1360\" data-start=\"1357\"\u003eSoak the diffuser in water for 30 minutes before first use for optimal mist output.\u003c\/li\u003e\n\u003cli data-end=\"1515\" data-start=\"1445\"\u003e\n\u003cstrong data-end=\"1472\" data-start=\"1445\"\u003eIdeal for Larger Tanks:\u003c\/strong\u003e\u003cbr data-end=\"1475\" data-start=\"1472\"\u003eSuitable for aquariums up to 30  litres.\u003c\/li\u003e\n\u003cli data-end=\"1616\" data-start=\"1517\"\u003e\n\u003cstrong data-end=\"1526\" data-start=\"1517\"\u003eSize:\u003c\/strong\u003e Ceramic disc diameter: 1.1 cm (0.43 inches).\u003cbr data-end=\"1573\" data-start=\"1570\"\u003e\u003cstrong data-end=\"1586\" data-start=\"1573\"\u003eWarranty:\u003c\/strong\u003e 1‑Year Warranty (\u003cstrong\u003e\u003ca title=\"WARRANTY TERMS AND CONDITIONS - Castle Dawn Aquatics\" href=\"https:\/\/www.castledawnaquatics.com\/pages\/warranty-terms-conditions\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eT\u0026amp;Cs apply\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e).\u003c\/li\u003e\n\u003cli data-end=\"1843\" data-start=\"1618\"\u003e⚠️ \u003cstrong data-end=\"1633\" data-start=\"1621\"\u003eWarning:\u003c\/strong\u003e Beware of cheaply made diffusers sold on low-cost apps like Temu. These are often made from non-aquatic safe materials, clog easily, break quickly, and can harm your aquarium setup.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castle Dawn Aquatics","offers":[{"title":"Default Title","offer_id":51075227255065,"sku":"SKU00147-99","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/files\/CastleDawnAquaticsCO2DiffuserNanoAcrylicDiffuserforPlantedAquariumFishTanks11mmceramicDisk.jpg?v=1753236275"},{"product_id":"the-castle-dawn-aquatics-druchtin-co2-diffuser-large-size-for-aquariums-over-250l-high-density-nano-mist-reactor-for-planted-tanks","title":"Large High-Density 'Druchtin' CO2 Diffuser – Over 250L\/55gal","description":"\u003cp data-start=\"247\" data-end=\"565\"\u003eThe Castle Dawn Aquatics Large CO2 Diffuser is designed for high-capacity planted tanks over 250L \/ 55 gallons. This precision in-tank diffuser uses advanced nano CO₂ mist membrane technology to provide exceptional dissolution rates, ensuring your aquatic plants get the CO₂ they need efficiently and without waste.\u003c\/p\u003e\n\u003cp data-start=\"567\" data-end=\"891\"\u003eMade with durable materials, it’s built for long-term use and easy maintenance. Unlike fragile glass diffusers, this robust acrylic body can handle cleaning and setup without risk of breakage. The ultra-fine mist it produces maximises CO₂ absorption, making it an excellent choice for both beginner and advanced aquascapers.\u003c\/p\u003e\n\u003cp data-end=\"1305\" data-start=\"1268\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-end=\"1305\" data-start=\"1268\"\u003eKey Features and Important Notes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1012\" data-end=\"1105\"\u003e\n\u003cstrong data-start=\"1012\" data-end=\"1032\"\u003eWhat’s Included:\u003c\/strong\u003e\u003cbr data-start=\"1032\" data-end=\"1035\"\u003e– 1 × Large CO2 Diffuser Unit\u003cbr data-start=\"1064\" data-end=\"1067\"\u003e⚠️ Tubing and CO₂ system not included.\u003c\/li\u003e\n\u003cli data-start=\"1107\" data-end=\"1202\"\u003e\n\u003cstrong data-start=\"1107\" data-end=\"1131\"\u003eFor Large Aquariums:\u003c\/strong\u003e\u003cbr data-start=\"1131\" data-end=\"1134\"\u003eSuitable for tanks over 250 litres – high-capacity precision design.\u003c\/li\u003e\n\u003cli data-start=\"1204\" data-end=\"1301\"\u003e\n\u003cstrong data-start=\"1204\" data-end=\"1229\"\u003eNano Mist Technology:\u003c\/strong\u003e\u003cbr data-start=\"1229\" data-end=\"1232\"\u003eReleases ultra-fine CO₂ bubbles for maximum absorption and low waste.\u003c\/li\u003e\n\u003cli data-start=\"1303\" data-end=\"1404\"\u003e\n\u003cstrong data-start=\"1303\" data-end=\"1328\"\u003eDurable Construction:\u003c\/strong\u003e\u003cbr data-start=\"1328\" data-end=\"1331\"\u003eBuilt with strong, aquarium-safe materials for longevity and reliability.\u003c\/li\u003e\n\u003cli data-start=\"1406\" data-end=\"1495\"\u003e\n\u003cstrong data-start=\"1406\" data-end=\"1421\"\u003eEasy Setup:\u003c\/strong\u003e\u003cbr data-start=\"1421\" data-end=\"1424\"\u003eSimple to install – just connect to your CO₂ regulator with 6mm tubing.\u003c\/li\u003e\n\u003cli data-start=\"1497\" data-end=\"1592\"\u003e\n\u003cstrong data-start=\"1497\" data-end=\"1522\"\u003ePressure Requirement:\u003c\/strong\u003e\u003cbr data-start=\"1522\" data-end=\"1525\"\u003eRecommended starting pressure: 2 bar. Allow a few minutes for flow.\u003c\/li\u003e\n\u003cli data-start=\"1594\" data-end=\"1694\"\u003e\n\u003cstrong data-start=\"1594\" data-end=\"1618\"\u003eHigh CO₂ Saturation:\u003c\/strong\u003e\u003cbr data-start=\"1618\" data-end=\"1621\"\u003eIncreases available CO₂ in the water column to support lush plant growth.\u003c\/li\u003e\n\u003cli data-start=\"1696\" data-end=\"1764\"\u003e\n\u003cstrong data-start=\"1696\" data-end=\"1705\"\u003eSize:\u003c\/strong\u003e\u003cbr data-start=\"1705\" data-end=\"1708\"\u003e5.5 × 4 × 3.5 cm (H × L × W)\u003cbr data-start=\"1736\" data-end=\"1739\"\u003e2.17 × 1.57 × 1.38 inches\u003c\/li\u003e\n\u003cli data-start=\"1766\" data-end=\"1810\"\u003e\n\u003cstrong data-start=\"1766\" data-end=\"1779\"\u003eWarranty:\u003c\/strong\u003e\u003cbr data-start=\"1779\" data-end=\"1782\"\u003e1‑Year Warranty (\u003cstrong\u003e\u003ca href=\"https:\/\/www.castledawnaquatics.com\/pages\/warranty-terms-conditions\" title=\"WARRANTY TERMS AND CONDITIONS - Castle Dawn Aquatics\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eT\u0026amp;Cs apply\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e).\u003c\/li\u003e\n\u003cli data-start=\"1812\" data-end=\"2057\"\u003e⚠️ \u003cstrong data-start=\"1815\" data-end=\"1827\"\u003eWarning:\u003c\/strong\u003e Due to its popularity, counterfeit versions made from non-aquatic safe materials are being sold on various low-cost apps like Temu. These imitations may clog, break easily, or release harmful substances that damage your aquarium.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castle Dawn Aquatics","offers":[{"title":"Default Title","offer_id":51075260776729,"sku":"SKU00148-100","price":22.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/files\/LargeCO2diffuserforaquariumsover250Lor55UKgallonsCastleDawnAquaticsnanomistin-tankCO_diffuser.jpg?v=1753238136"},{"product_id":"castle-dawn-aquatics-small-co2-diffuser-precision-style-in-tank-diffuser-for-aquariums-below-250l-55-uk-gallons","title":"Small High-Density 'Druchtin' CO2 Diffuser – Below 250L\/55gal","description":"\u003cp data-end=\"565\" data-start=\"247\"\u003eThe Castle Dawn Aquatics Large CO₂ Diffuser is designed for high-capacity planted tanks below 250L \/ 55 gallons. This precision in-tank diffuser uses advanced nano CO₂ mist membrane technology to provide exceptional dissolution rates, ensuring your aquatic plants get the CO₂ they need efficiently and without waste.\u003c\/p\u003e\n\u003cp data-end=\"891\" data-start=\"567\"\u003eMade with durable materials, it’s built for long-term use and easy maintenance. Unlike fragile glass diffusers, this robust acrylic body can handle cleaning and setup without risk of breakage. The ultra-fine mist it produces maximises CO₂ absorption, making it an excellent choice for both beginner and advanced aquascapers.\u003c\/p\u003e\n\u003cp data-start=\"1268\" data-end=\"1305\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-start=\"1268\" data-end=\"1305\"\u003eKey Features and Important Notes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-end=\"1105\" data-start=\"1012\"\u003e\n\u003cstrong data-end=\"1032\" data-start=\"1012\"\u003eWhat’s Included:\u003c\/strong\u003e\u003cbr data-end=\"1035\" data-start=\"1032\"\u003e– 1 × Large CO₂ Diffuser Unit\u003cbr data-end=\"1067\" data-start=\"1064\"\u003e⚠️ Tubing and CO₂ system not included.\u003c\/li\u003e\n\u003cli data-end=\"1202\" data-start=\"1107\"\u003e\n\u003cstrong data-end=\"1131\" data-start=\"1107\"\u003eFor Large Aquariums:\u003c\/strong\u003e\u003cbr data-end=\"1134\" data-start=\"1131\"\u003eSuitable for tanks over 250 litres – high-capacity precision design.\u003c\/li\u003e\n\u003cli data-end=\"1301\" data-start=\"1204\"\u003e\n\u003cstrong data-end=\"1229\" data-start=\"1204\"\u003eNano Mist Technology:\u003c\/strong\u003e\u003cbr data-end=\"1232\" data-start=\"1229\"\u003eReleases ultra-fine CO₂ bubbles for maximum absorption and low waste.\u003c\/li\u003e\n\u003cli data-end=\"1404\" data-start=\"1303\"\u003e\n\u003cstrong data-end=\"1328\" data-start=\"1303\"\u003eDurable Construction:\u003c\/strong\u003e\u003cbr data-end=\"1331\" data-start=\"1328\"\u003eBuilt with strong, aquarium-safe materials for longevity and reliability.\u003c\/li\u003e\n\u003cli data-end=\"1495\" data-start=\"1406\"\u003e\n\u003cstrong data-end=\"1421\" data-start=\"1406\"\u003eEasy Setup:\u003c\/strong\u003e\u003cbr data-end=\"1424\" data-start=\"1421\"\u003eSimple to install – just connect to your CO₂ regulator with 6mm tubing.\u003c\/li\u003e\n\u003cli data-end=\"1592\" data-start=\"1497\"\u003e\n\u003cstrong data-end=\"1522\" data-start=\"1497\"\u003ePressure Requirement:\u003c\/strong\u003e\u003cbr data-end=\"1525\" data-start=\"1522\"\u003eRecommended starting pressure: 2 bar. Allow a few minutes for flow.\u003c\/li\u003e\n\u003cli data-end=\"1694\" data-start=\"1594\"\u003e\n\u003cstrong data-end=\"1618\" data-start=\"1594\"\u003eHigh CO₂ Saturation:\u003c\/strong\u003e\u003cbr data-end=\"1621\" data-start=\"1618\"\u003eIncreases available CO₂ in the water column to support lush plant growth.\u003c\/li\u003e\n\u003cli data-end=\"1764\" data-start=\"1696\"\u003e\n\u003cstrong data-end=\"1705\" data-start=\"1696\"\u003eSize:\u003c\/strong\u003e\u003cbr data-end=\"1708\" data-start=\"1705\"\u003e5.3 × 3.2 × 2.3 cm (H × L × W)\u003cbr data-start=\"1646\" data-end=\"1649\"\u003e2.09 × 1.26 × 0.91 inches\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1810\" data-start=\"1766\"\u003e\n\u003cstrong data-end=\"1779\" data-start=\"1766\"\u003eWarranty:\u003c\/strong\u003e\u003cbr data-end=\"1782\" data-start=\"1779\"\u003e1‑Year Warranty (\u003cstrong\u003e\u003ca title=\"WARRANTY TERMS AND CONDITIONS - Castle Dawn Aquatics\" href=\"https:\/\/www.castledawnaquatics.com\/pages\/warranty-terms-conditions\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eT\u0026amp;Cs apply\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e).\u003c\/li\u003e\n\u003cli data-end=\"2057\" data-start=\"1812\"\u003e⚠️ \u003cstrong data-end=\"1827\" data-start=\"1815\"\u003eWarning:\u003c\/strong\u003e Due to its popularity, counterfeit versions made from non-aquatic safe materials are being sold on various low-cost apps like Temu. These imitations may clog, break easily, or release harmful substances that damage your aquarium.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castle Dawn Aquatics","offers":[{"title":"Default Title","offer_id":51075306127641,"sku":"SKU00148-101","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/files\/SmallCO2diffuserforaquariumsunder250Lor55UKgallonsCastleDawnAquaticsnanomistin-tankCO_diffuserB.jpg?v=1753238567"},{"product_id":"castle-dawn-aquatics-super-co2-diffuser-compact-internal-diffuser-for-aquariums-up-to-45-litres-10-uk-gallons","title":"Super CO2 Compact Internal Diffuser up to 45 Litres","description":"\u003cp data-start=\"324\" data-end=\"581\"\u003eThe Castle Dawn Aquatics Super Diffuser is a sleek, internal CO2 diffuser designed for smaller aquariums. It effortlessly connects to standard CO2 tubing and secures easily inside the tank, delivering a fine mist of CO2 for improved plant health and growth.\u003c\/p\u003e\n\u003cp data-start=\"583\" data-end=\"868\"\u003eIts compact design is ideal for aquascapes where space is limited, and it provides consistent and efficient diffusion without obstructing your view. Perfect for tanks up to 45 litres (10 UK gallons), this is an ideal starter CO2 diffuser for beginner and experienced aquascapers alike.\u003c\/p\u003e\n\u003cp data-start=\"1268\" data-end=\"1305\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong data-start=\"1268\" data-end=\"1305\"\u003eKey Features and Important Notes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"864\" data-end=\"974\"\u003e\n\u003cstrong data-start=\"864\" data-end=\"884\"\u003eWhat’s Included:\u003c\/strong\u003e\u003cbr data-start=\"884\" data-end=\"887\"\u003e– 1 × Super CO2 Diffuser (Small or Large)\u003cbr data-start=\"928\" data-end=\"931\"\u003e⚠️ CO2 tubing and suction cup not included.\u003c\/li\u003e\n\u003cli data-start=\"976\" data-end=\"1050\"\u003e\n\u003cstrong data-start=\"976\" data-end=\"993\"\u003eSize (Small):\u003c\/strong\u003e 3 × 3.1 × 1.1 cm (H × L × W)\u003cbr data-start=\"1022\" data-end=\"1025\"\u003e1.18 × 1.22 × 0.43 inches\u003c\/li\u003e\n\u003cli data-start=\"1052\" data-end=\"1126\"\u003e\n\u003cstrong data-start=\"1052\" data-end=\"1069\"\u003eSize (Large):\u003c\/strong\u003e 3 × 3.7 × 1.1 cm (H × L × W)\u003cbr data-start=\"1098\" data-end=\"1101\"\u003e1.18 × 1.46 × 0.43 inches\u003c\/li\u003e\n\u003cli data-start=\"1128\" data-end=\"1222\"\u003e\n\u003cstrong data-start=\"1128\" data-end=\"1156\"\u003eEffortless Installation:\u003c\/strong\u003e\u003cbr data-start=\"1156\" data-end=\"1159\"\u003eEasily connects to CO2 tubing and secures inside your aquarium.\u003c\/li\u003e\n\u003cli data-start=\"1224\" data-end=\"1326\"\u003e\n\u003cstrong data-start=\"1224\" data-end=\"1249\"\u003eSuper-Fine Diffusion:\u003c\/strong\u003e\u003cbr data-start=\"1249\" data-end=\"1252\"\u003eProduces microbubbles for optimal CO2 absorption and healthy plant growth.\u003c\/li\u003e\n\u003cli data-start=\"1328\" data-end=\"1409\"\u003e\n\u003cstrong data-start=\"1328\" data-end=\"1347\"\u003eCompact Design:\u003c\/strong\u003e\u003cbr data-start=\"1347\" data-end=\"1350\"\u003eMinimal visual impact – blends in with aquascaping layouts.\u003c\/li\u003e\n\u003cli data-start=\"1411\" data-end=\"1489\"\u003e\n\u003cstrong data-start=\"1411\" data-end=\"1431\"\u003eLow Maintenance:\u003c\/strong\u003e\u003cbr data-start=\"1431\" data-end=\"1434\"\u003eSimple to clean and reuse for long-lasting performance.\u003c\/li\u003e\n\u003cli data-start=\"1491\" data-end=\"1573\"\u003e\n\u003cstrong data-start=\"1491\" data-end=\"1524\"\u003eSuitable for Small Aquariums:\u003c\/strong\u003e\u003cbr data-start=\"1524\" data-end=\"1527\"\u003eDesigned for tanks up to 45 L (10 UK gallons).\u003c\/li\u003e\n\u003cli data-start=\"1575\" data-end=\"1619\"\u003e\n\u003cstrong data-start=\"1575\" data-end=\"1588\"\u003eWarranty:\u003c\/strong\u003e\u003cbr data-start=\"1588\" data-end=\"1591\"\u003e1‑Year Warranty (\u003cstrong\u003e\u003ca href=\"https:\/\/www.castledawnaquatics.com\/pages\/warranty-terms-conditions\" title=\"WARRANTY TERMS AND CONDITIONS - Castle Dawn Aquatics\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eT\u0026amp;Cs apply\u003c\/span\u003e\u003c\/a\u003e\u003c\/strong\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castle Dawn Aquatics","offers":[{"title":"Small - Under 45 Litres","offer_id":51075710255385,"sku":"SKU00148-102","price":19.99,"currency_code":"USD","in_stock":true},{"title":"Large - Over 45 Litres","offer_id":51075710288153,"sku":"SKU00148-103","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/files\/CastleDawnAquaticsSuperCO2DiffuserCompactInternalDiffuserforAquariumsupto45Litres10UKGallons-B.jpg?v=1753244977"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0036\/7679\/9046\/collections\/Aquarium_CO2_Diffusers_Section.jpg?v=1753313038","url":"https:\/\/www.castledawnaquatics.com\/collections\/aquarium-planted-tank-co2-diffusers.oembed?page=2","provider":"Castle Dawn Aquatics","version":"1.0","type":"link"}