We carry Ista and Hygger sponge filters. Sponge filters deliver powerful 3-in-1 filtration—mechanical, biological, and aeration—while staying whisper-quiet and easy to maintain. Perfect for shrimp, bettas, fry tanks, nano aquariums, and large tanks for supplemental filtration, it combines a high-density sponge with a ceramic bio media chamber to keep water clean, stable, and well-oxygenated. The foam material supports the colonization of bacteria for biological filtration. Requires an air pump for use.