Aquarium Sponge Filter, Small Portable Fish Filter with Bubble Stone to Increase Oxygen, Easy to Install and Clean for Freshwater and Aquariums

COMPACT DESIGN: aquarium sponge filter is small and portable, easy to install and takes up less space in the aquarium. INCREASE OXYGEN: Filter bubble stone can increase the oxygen content in the water and improve the quality of the water body. CIRCULATION FILTRATION: Small fish sponge filter can circulate and filter the water, reduce the waste of water. Item Type: Aquarium Sponge Filter Material: Plastic, Sponge