Yosoo Aquarium Mini Fish Tank Super Pneumatic Biochemical Activated Carbon Filter Using environmental high density sponge filter and high-performance activated carbon as filter material Can absorb dirt, quickly resolve fish feces and eliminate smell in water Help improve water oxygen level, need to connect with air pump Achieve oxygenation and biofiltration double effect, keep water clean Package included: 1 x Filter (Air pump not included), Dimension: 8*8*5.5 cm.