... 4.Easy installation Maintenanc Reverse osmosis technologyWith the report of raw water analysis and the different requirements in ... 99.7% inorganic salt, heavy metal ion and completely get rid of colloid, microbiology organic materials, germ, protozoa, pathogens, bacteria, ... citric acid or sodium hydroxide optional) 7) The lifespan of the whole system is long, operation simple, the applicability ...