HTH Spa Granule pH Down 2.5 lb - (Pack of 6)HTH Spa pH Down is specifically formulated to help balance pH levels in your spa water, ensuring superior water quality and enhanced comfort. By effectively lowering the pH, this remarkable product maximizes your sanitizer's efficiency while preventing the unsightly scaling of spa surfaces. Additionally, it plays a vital role in reducing skin and eye irritation, providing a delightful and soothing spa experience. HTH Spa pH Down is a must have