FILTER FOAM Screens out aquarium dirt and debris BIOLOGICAL FILTRATION Provides a large surface are for trapping particulate debris COMPATIBILITY Fits Marineland C-Series and Magniflow 160 and 220 Canister FiltersFOR BEST RESULTS Rinse pad monthly replace every 6 months MARINELAND FILTRATION PRODUCTS Count on Marineland brand for the most reliable technically advanced aquariums and accessories on the market Age Range Description: All Ages Included Components: Marineland Filter Foam For C-160 &Amp; C-220 Rite-Size S (2 Pk) Screen Out Dirt and Debris For PC 160 and 220 Aquarium filter accessories.