Imagitarium Replacement H Mini Filter Cartridges, Pack of 6, 6 GM

These premium cartridges help make your aquarium cleaner by removing unwanted fish waste and other debris, keeping your fish healthy and lively. Replace cartridge every 2 to 4 weeks depending on the amount of fish and number of daily feedings, simply insert filter cartridge into the power filter to keep your tank looking crystal clear. Includes three disposable and easy-to-use filter cartridges.