The Spa Selections pH Decreaser lowers the pH of spa or hot tub water. The ideal pH range 7.2-7.8. Maintaining pH in the proper range will allow your sanitizer to work more effectively, reduce equipment corrosion due to acidic water, and reduce eye irritation reduce skin dryness. About the Brand: Spa Selections was developed for use in spas, hot tubs, and jacuzzies. Our water care products are both economical and powerful enough for the toughest jobs. Within Spa Selections’ wide selection of products, we offer everything from algaecides and deposit control formulas to non-chlorine shock treatments, powerful surface cleaners, clarifiers, enzyme-based cleaners, and more. If you like using Spa Selections, check out some of the other similar brands from our parent company, Sigura. With brands like HTH, Leisure Time, GLB, Applied Biochemists, and PooLife, Sigura has a long heritage and more than a century of experience in developing innovative water treatment solutions for use in pools, lakes, ponds, hot tubs, and more. At Sigura, we have an unparalleled passion, pride, and commitment to delivering superior water treatments that improve the environment and enhance the security, health, and safety of the global communities we serve. With our track record of innovation and simple, intuitive solutions that anticipate needs, Sigura customers feel more secure as they enjoy their pools, spas, ponds, and lakes.