Water Softeners is the reduction of the concentration of the chemical element with symbol Ca and atomic number, chemical element with symbol Mg and atomic number and certain other metalneutral atom loses one or more electrons in generally not harmful.
Hardness ions dissolved in water can cause a variety of undesired effects including interfering with the action of soaps, the build up of limescale which can foul plumbing, and galvanic corrosion.
Water Softeners are common cations found in hard water. These ions enter a water supply by leaching from minerals within an aquifer. Common calcium-containing minerals are calcite and gypsum. A common magnesium mineral is dolomite (which also contains calcium). Rainwater and distilled water are soft, because they also contain few ions.