Fish tank filter three-in-one top filter aquarium, dissolved oxygen for biological growth. Features: with a retractable filter tank, aeration, filtration, and circulation three in one; power: 12W, the fish tank cleaner can push water into the water tank at a speed of 800L/H, with a filter box to meet your different needs. Low noise design, excellent mute effect. Different from other more decorative cold water aquarium filters, this tropical fish aquarium filter plays a 99% filtering effect, achieves the filtering effect, and truly purifies the tropical fish tank. Outer high-density cotton. Using new advanced filter cotton, high density, good water permeability, It can be reused and can also clean the aquarium fish manure, remove harmful substances, prevent the discoloration of the aquarium, and reduce the odor in the aquarium water. The rear filter aquarium adopts a hanging design, and it starts to work when it is hung on the wall of the aquarium, saving space. And can be used as