1, NSF standard coconut shell activated carbon 2, NSF standard KDF Media Function 1, Remove chlorine, pesticides, organic matter, rust 2, Reduce soluble heavy metal ions in water such as Pb2+,Cd2+ ,Cr6+ , As3+ , Hg2+ , Mn2+ , Ni2+ , Al3+ , Fe3+ etc. 3, Remove odor and improve taste 4, Kill algae and fungi, control bacteria growth 5, Remove hydrogen sulfide, calcium