A water softener uses a medium that serves to exchange "ions" of calcium and magnesium with sodium and potassium.
This occurs in four steps:
During the softening process sodium is released from the exchange media into the output water. For every grain of hardness removed from water, 8 mg/1 (ppm) of sodium is added. People on restricted sodium intake diets should account for increased levels of sodium in softened water.
Salt versus "No-Salt"
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