* Inflow and outflow filter tubes are designed to create the flow of water for plant growth. * The inflow flow at the bottom is adjustable, and the water level of the oil absorption film can be controlled, which is convenient for filtering and isolating impurity water and preventing fish and shrimp from inhaling. * Aquarium lily tube, inlet and outlet set, water surface skimming filter. * Effectively remove oil stains on the surface of fish tank and fish tank, and provide a fresh and healthy breathing environment. * Made of glass, simple and beautiful. Comes with suction cup for easy installation on your aquarium. With surface oil film treatment function, easy to clean.