Cascade Hang On Filter 150 Bio-Sponge

Penn Plax Cascade 150 GPH Bio Sponge Replacement Bio Sponge for the Cascade Hang On 150/200 power filters. Penn Plax Cascade 150 GHP Bio Sponge is ideal for housing beneficial bacteria for superior biological filtration. Product Features Replacement Bio Sponge Suits Cascade Hang On 150/200 power filters Grows beneficial bacteria for superior biological filtration Contains 1 replacement sponge Shop more aquarium filter media and parts here.