... is eliminates specially the calcium magnesium ion in the water, effectiveness reaches as high as 99%, simultaneously may also remove the algae ... + = R2Mg + 2Na+R2Ca + 2NaCl = 2RNa + CaCl2R2Mg + 2NaCl = 2RNa + MgCl2 Application : For chemical , water treatment ,electron ,textile ,printing & dying ,Food industrial , medical, sluice ...