Ph Down 1lb. April 3, 2017 MasterSpasAdmin $5.95 Add to cart Add to Wishlist Product added! Browse Wishlist The product is already in the wishlist! Browse Wishlist Category: Spa Chemicals Tags: ph down, PH down for hot tubs Description Description Used to lower the pH and total alkalinity. Control the pH by maintaining levels between 7.2 and 7.8 pH and total alkalinity should be tested and compared together. The total alkalinity range is 80 to 120 ppm. Manufacturer: Robarb Related products Ph Up 1lb. $5.95 Add to cart Rendezvous Spa Clarifier 32oz. (replacing Super Blue) $18.95 Add to cart Foam Out 32oz. $18.95 Add to cart Scum Balls – 2 pack $14.95 Add to cart