Penn Plax Cascade 1200/1500 GPH Bio Sponge
Bio-Sponge filter media works to keep your aquarium water clean & clear. Specially designed to fit your Cascade Canister Filter Pump, Bio-Sponge filter media optimizes the colonization of beneficial aerobic bacteria and removes ammonia and nitrites keeping your aquarium clean and healthy. Bio-Sponge filter media comes in various sizes made to fit your exact Cascade Cannister Filter Pump. For use on canister type filter pumps only.