Aqueon QuietFlow Filter Floss Cartridge (Large size: 3 pack)

This filter cartridge is designed for Aqueon QuietFlow Filters Models 20, 30, 50 and 75. It is the best quality floss filter cartridge on the market for solids & carbon. We recommend cutting the top of the cartridge open carefully with a scissors and add several tablespoons more of carbon. Box comes with three filter cartridges.