【Suitable for aquariums under 60cm】With 2 suction cups to absorb glass, it can be installed anywhere, and can also be used as a pre or secondary filter; very suitable for shrimp aquariums, betta aquariums, breeding aquariums, turtle aquariums, goldfish aquariums, discus, crayfish, fry, small fish or other fish. 【 【Multiple Filtration Functions】The sponge filter has two small filter boxes, which means that a larger area can be seeded with beneficial nitrifying bacteria, the circulation is faster, and the filtration effect is better. Sponge filters provide mechanical and biological filtration, ideal for bacterial colonization, and sponges capture larger debris particles that mechanically clean the water without catching small fish. 【Keep the 【Clean water】 You can easily remove 2 sponges from the filter to clean or replace it. It also has a filter holder inside that helps remove harmful substances and provides extra cleaning power. The circulation is faster, so the water in your tank is