Eheim CO2 Indicator Reagent

Liquid test indicator EHEIM CO2 for CO2 set 200 (6063200), CO2 set 400 (6063400) and CO2 set 600 (6063600)

Water test (long-term test)
Basically, you should always keep an eye on the CO2 content of your tank. The pH value of water is significantly affected by the addition of CO2. Therefore, a long-term CO2 test and indicator liquid as well as water test strips are always part of the continuous monitoring of the CO2 fertilization system.

EHEIM CO2 long-term indicator liquid
Indicator liquid - 10 ml for approx. 90 measurements/fillings of 4 drops