Spa Down by Leisure Time Spa Chemicals lowers pH and total alkalinity. Helps reduce eye and skin irritation due to your spa water having too high of a pH level. Spa Down (pH reducer) also increases the effectiveness of spa and hot tub sanitizers such as bromine and chlorine by keeping the pH level in balance. Measure your pH with Bromine Spa Test Strips or Chlorine Spa Test Strips and maintain 7.4 to 7.8 ppm. If your pH is higher than 7.8 use Spa Down to bring the pH into the desired level. 2.5 LBS. Bottle.