Multi Filtration FunctionsA 7-layer ribbed sponge that can quickly make a bio-filter, improve the quality of cleaning water and rotate the oxygen connection by 360 degrees without dead end. Keep your crystal aquarium clear and clean.Special ceramic filter media: this double sponge filter has a small container with ceramic filter media on each side, which increases the filter performance. Here you can use activated carbon for additional water purification instead of the ceramic parts.Easy installation: connect one end to your air pump with an air hose and the other end to this filter. The water outlet hose on the sponge filter is adjustable, so you can change the direction and height of the water flow. Do not use tap water to clean, but put the sponge in the water tank to clean so as not to destroy the environment of nitrifying bacteria of the sponge.Max suit for 200L aquarium: compatible with 2 suction cups, can be installed anywhere, can be easily hidden on the back of the aquarium and can also be used as a pre-filter or secondary filter. Suitable for both fresh and salt water. As well as growing various ornamental fish, fish breeding and growth, especially colourful fairies, small fish, shrimp tanks, aquariums, fighting, etc.