The goods belong to the general type, for different raw water quality to adapt to a wide range, can be adapted to various brands of membrane components> bfroy series HPMA selection of environmentally friendly chemicals to the scientific formula made by the multi-compound include: Dow membrane, Hyde film, Land of film bfroy series HPMAin reverse osmosis water treatmentin effective control of calcium carbonate, calcium phosphate scale, barium sulfate scale formation, In particular, the rate for calcium carbonate scale up to 100% of the polyvalent metal ion chelating ability to have a good>