Cascade Bio-Floss filter media from Penn-Plax works to keep your aquarium water clean & clear. Each filter in this 6-pack is specially sized & designed to fit your Cascade Canister Filter Pump. Bio-Floss filter media is made from a durable poly-fiber that traps floating particulate matter and debris, and helps to extend the life of your carbon and biological filter media. Bio-Floss filter media comes in the perfect size to fit your exact Cascade Cannister Filter Pump. For use on canister type filter pumps only.

• Convenient, no-fuss replacement pads for your Cascade canister filter
• Traps particular matter keeping your aquarium clean & clear
• Helps extend the life of your carbon and biological filters