Leisure Time Spa Balance Liquid Spa Down pH Decreaser (30440A) Spa water should be maintained at a pH of 7.2-7.8 and a total alkalinity of 80-120 ppm To lock in the pH from refill to refill, try Leisure Time pH Balance or Leisure Time pH Balance Plus. Raises the pH and total alkalinity in spa water. Pour directly into spa water and circulate. Decreases pH Compatible with chlorine, bromine, ozone and biguanides Solution requires no diluting This item is not for sale in Catalina Island