Dymax CO2 Drop Checker Indicator Solution (10ml) - Solution Only

The Dymax CO2 Drop Checker Indicator Solution is meant to be used for the Dymax CO2 Drop Checker Kit. This solution reacts to the concentration of CO2 within an aquarium and will change color accordingly, making a drop checker a vital part of injecting CO2. Blue indicates a low CO2 concentrations, green indicates an appropriate CO2 concentration, and yellow indicates a high CO2 concentration. The solution takes 1-2 hours to react and change color, so we recommend making small adjustments to the CO2 regulator at any given time.