Leisure Time Spa Calcium Boost – 1 qt
Quickly raise spa water hardness, and prevent foaming and equipment corrosion. Increases spa water hardness & hot tub water hardness to prevent corrosion. Compatible with chlorine, bromine, ozone and biguanide sanitizers Instructions: One ounce raises the calcium hardness 7 ppm in 500 gallons of water. Determine amount of product to be added. The ideal hardness level is 150-400 ppm. Turn jets ON to circulate spa water. Pour required amount into the water. Run filter for 1 to 2 hours. Retest water to ensure proper level. Repeat steps 1-5 until proper level is obtained.