【3 IN 1 INSTALLATION】: Our small aquarium filter can be installed in 3 ways. It can be used as a water filter to purify impurities in the aquarium or can be used as an oxygen pump for the water tank. Contact the air tube, it can increase the oxygen in the water and provide a healthy environment. 【ADJUSTABLE WATER FLOW RATE 600L/H】: The adjustable design helps to adjust the water flow speed and provide different water flow. The oxygen tube is also designed with an air flow control valve. Suitable for 80L aquarium. 【RAIN/WATER CURTAIN DESIGN】: The water spray mode will present a beautiful rain/water curtain scene. Note: Avoid excessive water flow, which may affect the life of fish. 【EASY TO ASSEMBLE AND CLEAN】: The aquarium filter pump is equipped with a suction cup that you can stick to the wall and bottom of the aquarium. The filter element can be easily disassembled and assembled. A small brush included will help you easily clean the inside of the spray bar. 【IMPORTANT NOTE】: The minimum water level is not lower than 5 cm, and the suction cup can be fixed on the glass surface. Please check and clean the filter parts regularly, once a month is recommended. The filtering effect will be better after cleaning.