A choice of densities allow for step-wise transition from mechanical to biological filtration
Excellent surface area per sq. ft. with good adhesion of nitrifying bacteria.
A high number of interstitial spaces in the tri-dimensional matrix of the filter media improves an early and even growth of bacteria.
High free volume for smooth, even water flow throughout.
Very resistant to plugging & easy cleaning.
Mats are self-supporting, form-stable, rigid and non-brittle.
Easy to cut to fit with a heavy-duty scissors, utility knife, circular saw or jig saw!
Non-toxic to the environment.
Light weight, versatile and durable.
Lasts for many years- 6+ (2-5 times longer than ANY other mat on the market!)
1-1/2" Thick (each pad is 1.5 inches thick).