About this item Notes: Must place the pump head UNDER the water level to prevent overheat of pump. Oxygen Supply: the filter would add oxygen to the water and improve growth of fish turtle frogs reptiles. It also provides oxygen to beneficial microbes in water filtration and ensure the water to be crystal clear. Wide Applications: Suitable for marine and freshwater aquariums. The filter could be lift up or laid down, which could be used in fish tank or low water level turtle tank. Multiple Filter Box: the filter boxes could be easily set up or cleaned. Multiple boxes have more room for filter media and filter cartridges. Multi-functional: The filter have both filter and air bump functions. You can easily switch from filter only function to multi-functional modes by adjusting the air tube. It has three stage filtration system, Chemical, Physical, and Biological Filtration Ultra Quiet: Running with very low noise, good for room tanks. ctions. You can easily switch from filter only function to multi-functional modes by adjusting the air tube. Submersible Water Pump: You can lay down the filter at the bottom of the aquarium and use it as a water pump.