Aquarium Solutions Bacto-Surge Biological Action Sponge Filter Black, Large

What sets this filter apart is the superior quality of its foam sponge. Hikari Aquarium Solutions Bacto-Surge Foam Filter utilizes top-tier foam material to ensure exceptional mechanical and biological filtration. The ultra-dense foam offers an expansive surface area per square inch, fostering a thriving environment for beneficial bacteria to grow and maintain water quality.