Techpugg Aquarium Bio Stone Sponge Filter. Sponge Aquarium Filter  (Biological Filtration for Salt Water and Fresh Water)

Sponge filters provide both mechanical and biological filtration -- Simple, effective,easy to clean (squeeze in tank water), Working perfect getting your fish tank water super clean and clear.This sponge filter with stones inside, the air can easily dissolves in water, enhance the oxygen to release better.Easy to install, can be installed anywhere and can be easily hidden on the back wall of the aquarium; ideal for shrimp tanks, crayfish, fry, fish or breeder aquariums.The sponge traps larger waste particles mechanically cleaning the water without trapping baby fish.They are useful for as breeding filter or as secondary filter, is the best choice for raising Shrimp and fishes.Filtration sponge provides vast surface area, cultivate high density nitrifying microorganism, playing the role of biological filtration.