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 and easy cleaning.
Mats are self-supporting, form-stable, rigid and non-brittle.
Easy to peel away layers and cut to fit with 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!)
Measures 22" in diameter and 6" thick.