Foamagic Aquarium Sponge Filter – Clean Water Starts Here Keep your aquarium water clean, clear, and healthy with the Foamagic Aquarium Sponge Filter. Designed for both freshwater and saltwater setups, this high-performance aquarium filter sponge provides reliable mechanical filtration by capturing debris, uneaten food, fish waste, and organic particles before they affect water quality. Made from durable 20 PPI open-cell foam, it offers a perfect balance of filtration efficiency and water circulation. The increased surface area not only improves flow but also supports natural filtration over time. The sponge measures 20" x 20" x 1" and can be cut to size to fit various filtration systems, including canister filters, sumps, hang-on-back (HOB) filters, turtle tanks, and pond filter pads. Whether you're using it as primary or supplementary filter media for your fish tank, this versatile sponge adapts to your needs. Foamagic's aquarium filter foam is dye-free, non-toxic, and completely safe for fish, shrimp, and corals. Cleaning is quick and easy—just rinse with tank water and reuse, reducing waste and saving money over time. Vacuum-packed for easier shipping. After opening, allow up to 24 hours for full expansion. Slight creases may appear but won't impact performance