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.

• Convenient, no-fuss replacement sponge for your Cascade canister filter.
• Optimizes the colonization of beneficial aerobic bacteria.
• Removes ammonia & nitrites keeping your aquarium healthy.