Shanrya Submersible Sponge Filter for Aquarium - Fluidized Bed Bio Filter with High Dissolved Oxygen - Ideal for Fish Tanks, Shrimp Tanks & Aquatic Plant Tanks

[Double Effect] Double filtration, the double combination of physical filtration and biochemical filtration, the effect of filtering impurities is better and the filtration is cleaner.

[Large Filter Box] Upgraded and enlarged filter cartridge to accommodate more filter materials, and the filter materials (filter cotton, house, etc) can be replaced at will to increase the water purification effect.

[Filter Cotton] Fine filter cotton, intercepting particulate pollutants, cotton fiber filtration, good permeability without clogging, high water permeability without water accumulation, maintaining good water circulation.

[Rolling Working] Rolling culture, built in new v‑1 biochemical filter material (outer diameter 7mm/0.3in) connected to the oxygen pump to continuously roll under the action of oxygen.

[Principle Of Water Purification] The rolling increase of dissolved oxygen is conducive to the reproduction of and plays the role of water purification.