KDF 85 Filtration Media for Sulfur, Iron, Bacteria, Heavy Metals (5 lb.) KDF 85 water treatment media also controls scale, bacteria, fungi, and algae. KDF 85 process media can remove up to 99% of water-soluble lead, mercury, nickel, chromium, and more KDF 85 media controls the buildup of bacteria, algae, fungi and scale KDF 85 works great for municipal or well water.