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.