... Chemical water treatment agent (excluding: hydrolysis fenalamide, Poly dimethyl diallyl ammonium chloride, Aluminum ammonium sulfate (ammonium alum), PH regulator, algaecide, ... ) 4.1Water Flocculants, Water coagulant PAC (basic aluminium chloride, aluminum chlorohydrate), ferric sulfate, ferrous sulfate, ferric chloride, aluminum chloride, aluminum sulfate (alum), polyacrylamide, sodium silicate ...