Package Dimensions:20 x 8 x 7 cm Quantity:1 1. Double 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. 2. Rolling Culture: Built in new v1 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. 3. Fine Filter Cotton: Intercepting large and small particles of pollutants, cotton fiber filtration, good permeability, no clogging, high water permeability, no water accumulation, and can maintain a good water circulation. 4. Upgraded 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. 5. High 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. Specification: Item Type: Fluidized Bed Filter Material: Plastic Application: Fish Tank Fluidized Bed Filter packing list: 1 x Aquarium Fluidized Bed Filter 4 x Suction Cup [DOUBLE FILTRATION] Better filtering effect with physical and biochemical filtration [ROLLING CULTURE] Increased dissolved oxygen for reproduction of nitrifying bacteria [FINE FILTER COTTON] Intercepts pollutants without clogging [UPGRADED FILTER BOX] Accommodates more filter materials for better filtering [HIGH QUALITY MATERIAL] Sturdy and durable plastic construction See more product details [DOUBLE FILTRATION] Better filtering effect with physical and biochemical filtration [ROLLING CULTURE] Increased dissolved oxygen for reproduction of nitrifying bacteria [FINE FILTER COTTON] Intercepts pollutants without clogging [UPGRADED FILTER BOX] Accommodates more filter materials for better filtering [HIGH QUALITY MATERIAL] Sturdy and durable plastic construction