Water very commonly contains hardness elements such as magnesium and calcium, dissolved rock, hence the description of hard water. Soft water is when these minerals are removed
through a process known as ion exchange. If you have hard water, you may see staining or scaling build up on your sinks, tubs, showers and clothing; scaling deposits on your glassware; and damage due to scale in your pipes and appliances. You will also notice less lather from your shampoos/soaps and a filmy dryness feeling on your skin. Often, types of skin irritations are tied to hard water. All of these are symptoms of the need for softened water.