Fluval Disposable CO2 Cartridge Fish CO2 Care, 3 Count

With the Fluval Disposable CO2 Cartridge Fish CO2 Care, you can support your aquarium plant health. The cartridge pairs with the Fluval Supply Set Fish CO2 Care (sold separately). It helps to keep and maintain a healthy aquarium and provides a consistent stream of carbon dioxide to supplement your plants. The cartridge is disposable.