Penn-Plax Cascade Bio-Sponge Replacement Fish Pads, 2 Count

Keep your tank water clean and crystal clear with Penn-Plax Cascade Bio-Sponge Replacement Fish Pads! Specially designed for Cascade Max Flow Canister Filters (each sold separately), these pads allow you to easily replenish media without cutting to size and fit directly into media trays. Perfect for your freshwater or saltwater aquarium, these replacement bio-sponge pads optimize the colonization of anaerobic bacteria and provide mechanical filtration that traps large particulate matter. Even though they’re disposable, you can easily reuse them over and over. Simply clean the bio-sponges in a separate container within some of your aquarium’s water, so the anaerobic bacteria colony remains intact. Created to prevent clogging of finer filter media so they perform better, these pads improve overall filtration and extend the lifespan of other media and the filter itself (sold separately). This is also great for use with aquatic turtles and aquatic amphibians.