[Multifunctional filtration] Sponge filter, provides biofiltration, physical filtration, oxygenation, ventilation, improves water quality, improves the treatment of water quality, in a single solution for your aquarium fish tank. .[ 80ppi thin sponge] high -density porous 80ppi thin sponge, prevents the absorption of puppy fish into the filter system, 2 pieces of 9 layer ribbed sponge provides more surface area for the growth of useful small creatures, imprisones good water flow, floating ruins and fine particles .[ Easy to use] Air stone is not required, super silent, connect the airline pipe to the air pump and connect to the air entrance of the sponge filter, bubbles go, in a single solution, both filtration and ventilation, the water is well oxygenated, the water output can be retracted and rotated .[ Easy to use clean] All parts of this filter can be removed, remove the sponge from the filter, rinse and squeeze it in used aquarium water, we recommend you to clean the sponges weekly and regularly .[ For tank size: up to 75 gallon] sponge filter 2 comes with the media chamber, you can put any kind of biomedia or coal (not involved), which increases the biophiltration effect and improves water quality. What do you get: 1 x dual sponge filter (not included) with 2 media chamber), 1 x retail package bag