A. Hard water leaves behind mineral deposits that are frequently referred to as "limescale" or "scale" when it originates from regions with high calcium or magnesium carbonate levels. Corrosion and pipe blockage are two effects of limescale buildup. In addition, it is unattractive, produces stains on clothes and dishes, and causes homeowners ongoing annoyance. More importantly, limescale accumulation on water heater components lowers their general efficiency and raises energy costs.