Hot Tub Water Treatment / Hot Tub Balancers

Add 1 ounce to increase Total Hardness by 12ppm for 500 gallons Spa

Power Cal raises the total hardness of the water in a spa or swimspa.  Total hardness must be balanced with total with total alkalinity to prevent scaling and corrosive conditions.   Low calcium can lead to corrosion as the water draws the calcium from the components.  It can also cause the surface to feel slimy.