Fluval 20g-CO2 Disposable Cartridges - 3-Pack
The Fluval Disposable CO2 Cartridge, 0.7 ounces is a pack of three cartridges that are replacement parts for the Fluval Mini CO2 Supply Set. Proper amounts of CO2 are important to ensure that the most important nutrients are available to plants to maintain vigorous, lush and vibrant growth and condition.