The mini filter aquarium is small and suitable for small aquariums, such as spherical aquariums, special-shaped aquariums and other small family aquariums.It can effectively filter and supply oxygen.Mini filter: It is small and suitable for small aquariums, such as spherical aquariums, special-shaped aquariums and other small family aquariums. It has three functions: filtration, water circulation and oxygen supply.Filtering Function: Small volume but big function, this mini filter can filter effectively.Directions: Works completely submerged in water.Suction cup design: strong suction force, it can be installed anywhere on the aquarium.Do not use an oversized air pump to avoid uneven mixing of water and air.Easy cleaning and maintenance Low loss and high efficiency Super quiet long lifespan.Easy to maintain: Clean the sponge once a month and change it every 5 to 6 months. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.