Description: Increase the Oxygen Content of Water: The aquarium air filter filters out excess impurities in the water for aquarium organisms, helps stabilize water quality and increases oxygen solubility. Three Layer Design: The bottom of the mini filter pump is a layer of biochemical sponge, which can filter impurities in water, and the middle layer is layers of bubble stone, which can increase the oxygen content in water and increase the survival rate of fish. The upper layer is the water outlet. Easy to use: There is a suction cup at the bottom of the aquarium filter, which can be adsorbed anywhere in the aquarium. There is no need to specially reinforce the base, and there is no need to s worry about accidentally hurting the fish. Ultra-Quiet: When the aquarium air pump is used, it works quietly and makes no noise, but the filtering effect is excellent, you can use it with confidence. Wide Range of Applications: The oxygen filter is suitable for small aquariums such as spherical aquariums, small aquariums, special-shaped aquariums and other small home aquariums. Function: -Material: the filter pump is made of high quality PVC, non-toxic and harmless, super durable. - "Water Curtain" Effect": When the filtration pump is working, it will produce a series of bubbles formed by the water curtain, which is very ornamental. Specification: *Quality: 1 Pcs biochemical sponge filter and 1 trachea * Material: plastic * White colour * Packing: Opp bag Size:The aquarium sponge filter:9.8*3cm; Trachea:90*0.6cm. Total size:10*8*4cm Delivery: 1 biochemical sponge filter and 1 trachea Remark: 1.For manual measurement, please allow 1~3mm error, thanks. 2.Due to differences between different monitors, the picture may not match the actual color of the project.