Bio Sponge for Penn-Plax Cascade 1200 / 1500 Canister Filter Foam - 2 Pack
This premium quality bio sponge is custom designed and manufactured for Penn-Plax Cascade 1200 / 1500 Canister Filters.  The dense foam pad encourages beneficial bacteria growth while removing particles from your aquarium.  Each package contains two bio-sponge filter pads.