4 In 1 Aquarium Water Pump-- Submersible fish tank water pump can be used as water filter, wave maker, fountain water pump and oxygen supply. Suitable for aquariums, keeping and rearing tanks or small water features. Fish Tank Loop Filtering and Air Supply-- Powerful fish tank filter pump simulate the natural environment to make strong wave, provide a complete water cycle through filter cartridge for the aquarium. It can also deliver oxygen to the fish tank at the same time by adding oxygen nozzle. Adjustable Water Flow-- A switch on the side of aquarium internal filter helps adjust the water flow rate easily, provides different water flow effects. Oxygen supply tube is designed with air flow control valve. Ultra Quiet & Wide Applications-- Aquarium filter uses ceramic shaft and copper wire motor, runs more smoothly without too much noise, suit for both fresh and seawater. Water pump head high can up to 31inch (0.8m).