【Multifunctional External Aquarium Filter】External aquarium filter provide filtration, water circulation function, which can effectively remove impurities in the aquarium. Thus creating a healthy environment for fish and aquatic plants. It can be hung outside the fish tank to form a waterfall effect, both beautiful and practical. 【2 PCS Filter Sponges】 Aquarium pumps and filters come with 2 sponges ultra-fine filter filters and can be used repeatedly. It can filter impurities in depth, effectively solve the problem of water turbidity and fish hypoxia. Degreasing film design filter that automatically adjusts the height or rotation according to the water level to remove impurities on the surface and clean water.