Features Instantly raises pH in spa or hot tub Allows immediate use after treatment Compatible with ALL forms of sanitization Benefits Raises pH to get to the ideal range of 7.2-7.6 Provides comfort to users Easy to use application Applications Broadcast over entire spa water surface with pump running If pH of water is between 6.8-7.2, add 1 ounce (2 tbs) for every 500 gallons of water If the pH is below 6.8, Add 2 ounces (4 tbs) for every 500 gallons of water 30 minutes after addition of Spa pH Up, retest pH and adjust if necessary