Poly-Flo 2" Black Biological Filter Mat - 56"x90'

Poly-Flo's most popular biological filtration media. This is the 2 thick version and is 90 x 56. The 2" material is used exclusively in virtually all US manufactured pond skimmers and waterfall units. The open character of this filter media allows for high volumes of water to pass through without clogging while providing optimal surface area to facilitate bacterial colonization.