3 in 1 DESIGN: The aquarium filter has the function of filtration, oxygen aeration and oil film cleaning, a variety of functions provided by an ultra-thin design filter, perfect for your aquarium QUIET OPERATION: When using for the first time, you need to inject water into the filter before starting the filter so that the pump can work normally, the closer the water level is to the outlet of the device , better is the effect ADJUSTABLE FLOW RATE: Adjustable water flow, dissolved oxygen for growing creatures. SUSPENSION DESIGN: can increase the filter space, also clean aquarium fish droppings, create a clean environment for your beautiful fish. HIGH EFFICIENCY: Filter cotton and filter material can effectively filter fine impurities in water and decompose fish droppings, accelerate water circulation and stabilize aquariums water quality.