... activated alumina, ceramics, molecular sieve (zeolite), manganese sand, copper and zinc alloy (KDF), microfiltration, ultrafiltration, nanofiltration, reverse osmosis membranes, ion exchange ... water treatment agent (excluding: hydrolysis fenalamide, Poly dimethyl diallyl ammonium chloride, Aluminum ammonium sulfate (ammonium alum), PH regulator, algaecide, calcium hypochlorite (bleach), sodium ...