Keywords: brackishwatertreatment, calciumandmagnesiumremovalfromwater, cation exchange, desalination, duplex, frpsoftener, ionicrejection, lab, laboratorywater, membrane, membraneseparation, osmoticpressure, resinsystem, reverseosmosispretreatment, reverseosmosissystem, ro tdsremoval, sodiumcycle, spotfreerinse, tdsreduction, totaldissolvedsolids, twinalternating, water hardness reduction, water softener, waterhardnessremoval, watts premier, watts, plumbing, water filtration, water filters, water softerners