1 count Cascade Canister Filter Bio-Sponge for 1200 and 1500

The Penn Plax Cascade Canister Filter Bio-Sponge keeps your aquarium water clean and clear. The Bio-Sponge also extends the life of carbon and biological media by trapping debris that would otherwise soil them.

• Optimizes colonization of beneficial aerobic bacteria
• Removes ammonia and nitrites keeping the aquarium healthy
• Convenient, no fuss, replacement sponge

Sizing: Fits Cascade 1200 and 1500 Canister Filters ONLY.