1.75" Nominal Thickness
Graduated density design offers much higher Flow Rate
Filters debris as small as 15 microns
No additives or adhesives
Manufactured in the USA
Puro-Kleen® Kleen-Guard biological aquatic filter media represents our original and most popular product. At 1.75" thick, it also represents our thickest option and is frequently used in pond skimmers. Unlike so-called "bonded" medias, which are merely comprised of two distinct density materials, Kleen-Guard is a uniquely engineered product made from a gradually progressing density structure designed to effective trap debris as small as 15 microns in size. This graduated density design allows for greatly superior flow rates over the life of the material. Like all Puro-Kleen medias, Kleen-Guard contains no added chemicals or ant-microbial agents which can harm aquatic life.