Features: 1Double Filtration: The fluidized bed filter adopts the double combination of physical filtration and biochemical filtration, which has better filtering effect of impurities and cleaner two effect filtration. 2Rolling Culture: Built in new v?1 biochemical filter material (outer diameter 7mm/0.3in), rolling under the action of oxygen, the increase of dissolved oxygen is conducive to the reproduction of nitrifying bacteria and plays the role of water purification. 3Fine Filter Cotton: Intercepting large and small particles of pollutants, cotton fiber gap filtration, good permeability, no clogging, high water permeability, no water accumulation, and can maintain a good water circulation. 4Upgraded Filter Box: The larger filter box can accommodate more filter materials, and the filtering effect is better. The filter materials (filter cotton/bacteria house, etc.) can be replaced at will. 5High Quality Material: The fish tank fluidized bed filter is made of high quality plastic material, which is sturdy and durable, and is widely used in fish tanks and aquariums. Item Type: Fluidized Bed Filter Material: Plastic Application: Fish Tank Fluidized Bed Filter Package Included: 1 x Aquarium&nbspFluidized&nbspBed&nbspFilter 4 x Suction Cup