Leisure Time Calcium Booster is used to increase the calcium hardness of spa water. Calcium hardness should be maintained between 200-400 ppm to prevent corrosion of spa equipment. 

Directions

1. Test your water's calcium hardness every week with Leisure Time Test Strips and adjust accordingly.

2. Add appropriate amount of Leisure Time Calcium Booster as designated in table below to maintain the spa water calcium hardness within the 200-400 ppm range.

3. Circulate spa water on high speed for a minimum of 15 minutes.