DescriptionDo you want a replacement biochemical sponge filter for your aquarium? Do you want to keep your fish tank clean? This can be your best choice. Really practical and useful, just install it inside fish tank and aquarium.Features-Color: As Shown. -Material: Sponge. -Size: About 40x30x2cm/15.72x11.79x0.79 inch. -Well-quality material, thick and not deformed. -Thicken encrypted fiber, multiple filtering effects. -Dense and orderly, high water permeability. -Scrub resistance, high elastic compression technology, longer life. -Easy to cut, widely applicable.