1. Just install a small filter for the fish tank, connect this filter to provide filtration, it is a good way to clean and oxygenate the fish tank.2. You can remove the sponge from the filter for easy cleaning or replacement. The sponge filter traps floating debris and protects your small fish from being sucked into the tank's small filter.3. The fish tank filter is small in size, does not take up space, adopts silent mode, and does not produce any noise at all when working.4. Filter the aquarium while increasing the oxygen, it can also filter the water and keep the water clean.5. Application: The sponge filter is suitable for fresh water and sea water, ideal for aquariums and fish tanks, it is a great gift for friends and family.