- The sponge filter provides biological filtration, and the air pump chamber produces small bubbles that increase oxygen solubility. - Creates crystal-clear water, ideal for small aquariums. - Convenient and easy maintenance. - Applicable to different filtration systems as a pre-filter. - Uses high-level, eco-friendly sponge as a filter, with the use of an air pump. - Ensures effective nitrifying bacteria culture, achieving stability in cleanliness and good water quality, and effective oxygen filtration and water quality.