CO2 Indicator Set, 0.50 fl oz / 15 ml

The Fluval CO2 Indicator Set (15ml) is an essential tool for maintaining the perfect carbon dioxide balance in your planted aquarium. It helps aquarists easily monitor CO2 levels to ensure optimal plant growth and a healthy aquatic environment.

This easy-to-use drop checker works by changing color to indicate CO2 concentration in your tank. A blue color signals low CO2, green indicates ideal levels, and yellow warns of excessive CO2, helping you adjust your system accurately.

The kit includes a glass reservoir, suction cup, and indicator solution that lasts up to 30 days, making it both convenient and reliable for regular aquarium maintenance.

Designed for freshwater planted aquariums, this CO2 indicator mounts easily inside your tank and provides a clear visual reference without complicated testing procedures.