Penn-PlaxCascade 150 or 200 GPH Hang On Filter Aquarium Bio Sponge Replacement; 1 Pack; Cut to fit Cascade 150 or 200

Penn-Plax Cascade 150 or 200 GPH Hang On Filter Aquarium Bio Sponge Replacement; 1 Pack; Cut to fit Cascade 150 or 200

Penn-Plax Cascade Hang-on Power Filter Replacement Cartridges - 3 Pack

Penn-Plax Cascade 200 Power Filter – Hang-On Filter with Quad Filtration – Great for Freshwater and Saltwater Setups