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 aquarium or can be used as an oxygen pump for water tank. Contact the air tube, it can increase oxygen of water and provide a healthy environment.ADJUSTABLE WATER FLOW 600L/H: The adjustable design helps adjust the water flow speed and provide different water flow. The oxygen tube is also designed with an ir 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 could affect fish life.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. Filter element can be easily disassembled and assembled. A small brush included will help you easily clean the interior of the spray boom.IMPORTANT NOTE: The minimum water level is not less than 5cm and the suction cup can be fixed on the glass surface. Please check and clean the filter parts regularly, once a month is recommended. Filtering effect will be better after cleaning.