... reverse osmosis (RO), nano-filtration (NF) and ultra-filtration (UF) system. 3>.It is compatible with all of the leading RO ... , CaSO4, SrSO4, BaSO4, CaF2, SiO2, Fe2O3, etc. 2>. Make the system don't scale even if the CaCO3 LSI is up ... :1>. Generally, the dosage is 2-6 mg/L in R.O system. 2>. Our technician can help you to calculate the exact ...