Chihiros CO2 Indicator Glass / Checker / Aquarium Monitor

Product Description:

Monitor your CO2 concentration in a planted tank with the help of a glass CO2 indicator. Our set includes one CO2 indicator glass with a suction cup only. If you need a bottle of CO2 indicator reagent liquid (without mixing aquarium water), please purchase separately by choosing the option.

Blue – insufficient CO2

Green – sufficient CO2

Yellow – too much CO2