An advantage of using potassium chloride as a water softener is the potential for better health. When potassium chloride softens water, it adds potassium ions to the water. Potassium is an essential mineral that is beneficial to the human body by reducing blood pressure and the risk of heart disease.
Another advantage is that water treated with potassium chloride is also beneficial to plants. It stimulates plant growth and improves plant reproduction. It is more beneficial to the environment than sodium chloride, which is also used as a water softener. Excess sodium tends to hamper plant growth and impairs a plant’s ability to take in adequate moisture.