【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 fish tank or can be used as an oxygen pump for the water tank. Contact the air tube, it can increase water oxygen and provide a healthy environment. 【600L/H ADJUSTABLE WATER FLOW】: Adjustable design helps to adjust water flow speed and provide different water flow. The oxygen tube is also designed with an airflow control valve. Suitable for 80L fish tank. 【RAIN/WATER CURTAIN DESIGN】: The water spray mode will present a beautiful rain/water curtain scene. Note: Avoid excessive water flow which may 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 the 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 boom. 【IMPORTANT NOTE】: The minimum water level is not