Help keep your underwater buddies’ aquarium in tip-top condition with the Penn-Plax Cascade Bio-Sponge 500 Aquarium Filter! This canister filter is designed to be used in the Cascade 500 model. It can help optimize the colonization of beneficial aerobic bacteria while removing nitrites and ammonia, keeping your tank free from unpleasant odor and grime. Every purchase comes with 1 medium filter.
Helps keep your aquarium water clean for your finned friends.