Aquanova CO₂ Test Indicator Fluid

Aquanova CO₂ Test Indicator Fluid

Refill fluid for CO₂ glass drop checkers .

Reliably indicates the CO₂ level in the aquarium via color change: Blue = too little , Green = optimal (≈ 30 mg/l) , Yellow = too high .

For application, 15 drops are placed in the glass indicator.
The display is permanent with a slight delay.