Muriatic Acid (Hydrochloric Acid) High Purity Super Concentrate 35% 4x Power is a versatile and powerful cleaning solution. This industrial-strength acid is made in the USA and can be used for various applications. It effectively removes lime and scale buildup, making it an excellent choice for acid cleaning. In swimming pools, it acts as a pH lowering agent, helping maintain the ideal water chemistry. Additionally, it excels at metal cleaning, removing rust and corrosion from surfaces. With its high concentration, a small amount goes a long way. Handle with care and follow safety precautions when using this potent acid. Ideal for professionals and serious DIYers alike.