Newest Products
CO2 Splitter – 4-Way Needle Valve with FREE Extension Rod
$32.99
Easily distribute CO2 from one cylinder to up to four aquariums using the Castle Dawn Aquatics 4‑Way CO2 Splitter. Made from durable stainless steel and aluminium alloy, each needle valve...
CO2 Splitter – 2-Way Needle Valve with FREE Extension Rod
$37.90
Easily distribute CO2 from one cylinder to up to two aquariums using the Castle Dawn Aquatics 2‑Way CO2 Splitter. Made from durable stainless steel and aluminium alloy, each needle valve...
Glass CO2 Drop Checker - Hang On Style
$12.57
Keep your planted tank thriving with the Castle Dawn Aquatics hang on Drop Checker. This elegant glass tool helps monitor dissolved CO2 levels in your aquarium, changing colour based on...
Glass CO2 Drop Checker - Orb Style
$12.57
Keep your planted tank thriving with the Castle Dawn Aquatics Orb Drop Checker. This elegant glass tool helps monitor dissolved CO2 levels in your aquarium, changing colour based on the...
Castle Dawn Aquatics CO2 Spiral Glass Bubble Counter
$24.99
Enhance your planted aquarium CO2 system with the Castle Dawn Aquatics CO2 Spiral Bubble Counter. Made from high-clarity borosilicate glass, this elegant bubble counter not only monitors your CO2 injection...
Castle Dawn Aquatics High-Pressure CO2-Resistant PVC Tubing
$1.50
The Castle Dawn Aquatics CO2 Resistant PVC Tubing (4/6 mm) ensures safe and leak-free operation of your CO2 system. Made from premium flexible PVC, it handles high pressure up to 6 kg...
Castle Dawn Aquatics CO2 Glass U-Tube 15 mm
$6.75
The Castle Dawn Aquatics Glass CO2 U-Tube 15 mm is a simple yet elegant solution for routing airline or CO2 tubing over the rim of your aquarium. Designed for use with...
Castle Dawn Aquatics Glass CO2 Bubble Counter - 17 mm
$11.99
The Castle Dawn Aquatics Glass CO2 Bubble Counter is an elegant and easy-to-use tool for monitoring the rate of CO2 injection in your planted aquarium. By minimising the visual footprint...
Super CO2 Compact Internal Diffuser up to 45 Litres
$19.99 – $24.99
The 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...
Small High-Density 'Druchtin' CO2 Diffuser – Below 250L/55gal
$19.99
The 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...
Large High-Density 'Druchtin' CO2 Diffuser – Over 250L/55gal
$22.99
The 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...
Acrylic CO2 Diffuser – Nano (11 mm Ceramic Disc)
$12.99
The 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...