Activated carbon filter,internal equiped with Activated carbon filtering media,which used for filtering the educt in the water,mocrobe,parts of heavy metal ion,wiping off most parts of organism,iron oxides,residual chlorine,also effectively decreased the water chromaticity,the reason is organism,iron oxides,residual chlorine can easily causes the ion exchange resin toxic and residual chlorine,cation surface active agent not only cause the resin toxic,but also destroy the membrane structure,which resulted in reverse osmosis membrane invalidation