This is a mat-type, filter media that combines maximum biological surface area to media volume with generous void space to allow the aeration necessary to nitrifying bacteria. The semi-rigid nylon...
Approximately 1-1/4 inch Thick x 56 inch Wide cut to order (Black) Stiffer than the white media and longer lasting. (note: 56" width can vary, we have seen this as narrow as 54" and as wide as 60",...
