4 in 1Functions: Filtration+Oxygenation +Pumping+Wave Making Features: *Strong Filtration: Large Capacity Fliter Box,Multi-Layer Filteation ,Convenient Disassembly And Better Water Purification Effect *Aeration and Wave Making *Adjustable Airflow: High Efficiency Oxygen Increase,Continuous Bubbles And Adjustable Gas Volume *Fast Pumping And Ultra Quite *Water Circulating :Absorb The Impurities And Fish Excrement In The Tank,And The Water Quality Will Be Clear For A long Time *High Strength Wear -Resistant Rotor,Long Service Life Product parameter: Model Power Voltage Flow Suitable Fish Tank Size Power Line Length ZY-N61 6W 110-220V 500L/H Below 60cm 1.1m ZY-N62 15W 1000L/H Below 80cm ZY-N63 25W 1500L/H Below 100cm ZY-N64 30W 1800L/H Below 120cm