Fluval CO2 Indicator Kit is used to monitor approximate CO2 levels and also helps gauge CO2 levels in aquariums. The kit includes a 0.34 fluid ounces CO2 Indicator Liquid, CO2 Indicator, and a color check sticker to help gauge CO2 levels.
Monitors levels of CO2 in aquariums
Provides accurate dosing of CO2
Ensures fish and plants live in a healthy environment

