【Multifunctional Aquarium Filter】: Our aquarium filter has four main functions: pumping, oxygen supply, filtration and circulation, the aquarium pump can be used in fresh water and sea water. This filter can effectively remove pollutants in the aquarium, thus creating a healthier environment for organisms in the water.【Adjustable Water Flow】: The maximum flow rate of this aquarium internal filter can reach 300L/H, which is very suitable for 60L type of aquarium, there is a unique design that can adjust the water flow through the inlet pipe on the side of the aquarium internal filter, thus supplying oxygen to the aquarium.【Two Modes of Use】: The aquarium pump has two modes of use. You can increase the oxygen through the inlet pipe and the nozzle, or you can use the rain connection pipe to improve the filtering effect and make the water filter more adequate. In case of low water level, the filter can be laid on its side underwater so that it can be used in the turtle tank.【Easy Installation and Cleaning】: There are several rubber suction cups on the outside of the aquarium filter, so it is easy to fix the filter inside the aquarium. The suction cup has strong suction force, safe and stable, and not easy to slip. At the same time, the built-in filter cotton can be easily replaced by simply removing the shell.【Important Note】: Rain mode and oxygen mode cannot be used at the same time. When using the rain mode, please adjust the amount of water to avoid excessive water flow and affect fish life. If you have any questions, please feel free to contact us.Note: The data are all manual measurement, please allow 1-3cm error, due to the difference in light and d display, there will be some color difference, depending on the physical object received.