Cascade Canister Filter Bio-Sponge 700 & 1000 Bio Sponge (1 Pack)
Penn Plax Cascade Canister Filter Bio-Floss replacement pads help trap floating particle matter, keeping your aquarium water crystal clear. Replacement is simple and convenient to keep your filter cleaning.
Specifications: Replacement pads for Cascade 1200 & 1500 Canister Filters only. Replacement pads for other models are also available.