Sirona Spa Care Calcium Booster is used to increase the calcium hardness of spa water. Calcium hardness should be maintained between 200-400 parts per million (ppm) to prevent corrosion of spa equipment. Calcium levels can be measured with a test strip test kit. This product is compatible with all sanitizers including bromine, chlorine, salt water, ozone, minerals and biguanide.

Directions for Use

One ounce of Calcium Booster will raise the calcium hardness 20ppm in 300 gallons of spa water. See chart on bottle for more details. 

1. Test the water with Sirona Spa Care & Hot Tub Test Strips to determine the amount of Calcium Booster needed.

2. Turn the jets on to circulate the water

3. Pour the required amount of Calcium Booster into the water

4. Run the pumps for 1-2 hours

5. Retest the water to ensure a proper level of 200-400ppm has been reached

6. Repeat steps 1-5 until the correct reading is obtained