Use this high quality PH Minus and PH + to adjust the PH value of the water in your spa (7.2 to 7.6 is the optimum for spas). PH Minus is also used to decrease the Total Alkalinity of your Spa, Hot Tub or pool water, PH + can be used to increase the Total Alkalinity, see Total Alkalinity Plus for a more direct way to increase alkalinity.
See Here For PH Minus Directions for Use
See Here For PH Plus Directionns for Use
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