The Seapora Breeder Sponge Filter is designed for applications requiring gentle, low-flow filtration. Ideal for breeding, fry, quarantine and shrimp aquariums, this easy-to-use filter provides superior mechanical and biological filtration. It can be driven by an air pump or powerhead, and is suitable for freshwater and marine use. Suitable for medium sized aquariums (15-35 Gallons). When fully assembled, the unit boasts a weighted base for added stability and has a maximum height of 9.25 inches and a diameter of 2.95 inches.