Pondmaster 190 Filter Replacement Media for PondsThe Pondmaster 190 Filter Replacement Media pack includes 2 pads: one foam filter pad and one coarse polyester media pad. Using these two media together in your pond filter provides chemical and biological filtration. These pads are washable and reusable. Chemical and biological filtration pads Washable and reusable Each set contains 1 foam filter pad and 1 coarse polyester media pad Serves as replacement for the PMK 190 Kit. The foam filter should be