ALEGI Aquarium Sponge Ftiler 30 Gallon for Breeding Fry, Betta, Shrimp Small Fish Tank - Product Features
The sponge medium is harmless to fish and it's suitable for both fresh and saltwater environments.
The sponge filter can trap debris and avoid clogging.
Easy to operate,use one end of an air hose connected to the filter, and the other end connected to an air pump. A check valve can be installed on the air hose to prevent backflow of water.
Recommend tank size: up to 30 gallon, Dimension: 3.3\" D X 4\"H