SOLUTIONS FOR AQUARIUMS BACTO-SURGE MINI SPONGE FILTER
Aquarium Solutions Mini Bacto-Surge Biological Action Sponge Filters are air-powered sponge filters (air pump not included) that offer superior mechanical and biological filtration of your aquarium water. The highly porous sponge contains extreme surface area and thousands of microscopic pores where aerobic bacteria, hydrated with hydrogen peroxide, can grow and thrive.