Increased surface area offers maximum bacteria colonization
Soft sponge material is easily cleaned
Polyether foam for longer life
Uplift tube and air diffuser combination provide maximum lift and won't easily clog
The difference is in the quality of the foam sponge. Hikari Aquarium Solutions Bacto-Surge Foam Filter employs the highest-quality foam sponge they could source to provide outstanding mechanical and biological filtration. Extreme foam density allows for greater surface area per square inch to support significant levels of beneficial bacteria.
