Dymax Iron Supplement

The Dymax Crystal CO2 Drop Indicator is a superior tool that accurately monitors CO2 levels in planted aquariums with a simple and efficient method. Made from high-quality glass, this indicator precisely indicates if an excess, optimal, or insufficient amount of CO2 has been injected into the tank (when used with the CO2 Indicator Solution, available separately). Additionally, the package includes a suction cup and comes in two sizes: Small (2" x 1") and Large (2.5" x 1.2"). Ensure stable CO2 levels in your planted tank with this expert-designed solution.