- It comes with the 4dkh testing solution.
- Size: 12 x 8.6 x 7.6cm (4.8 x 3.4 x 3.3 inches)
- Used to measure CO2 levels at a glance
- Helps maintain the appropriate CO2 level is critical in a planted aquarium.
- CO2 Levels are visible via the colour change of the 4dkh fluid and ph reagent in the drop checker.
- Green = OK, Yellow = Too Much, Blue = Not enough.
- Made from high-quality blown glass.