Penn Plax Cascade 170 GPH Internal Filter Aquarium Bio Sponge Replacement; 2 Pack
- Keep your water clean and clear with the replacement bio sponge for use in the Cascade 170 GPH Model CIF4 Internal Filter.
- The bio sponge filter removes ammonia and nitrites from your aquarium tank keeping your aquarium clean; healthy; and odor free.
- Filter sponge optimizes the colonization of beneficial aerobic bacteria which prevents the water from becoming cloudy and harming fish.
- Perfectly cut to fit into the Cascade 170 Internal Filter tray without any gaps which could allow pollutants to re-enter the water.
- Genuine Penn Plax replacement cartridge for Cascade 170 GPH model CIF4. When used together; the filter and bio sponge provide maximum protection against water pollutants.