Increases hardness in spa water. Prevents corrosion.
1. Hardness level should be tested often and maintained in the range of 100 to 200 ppm.
2. If level is below 100 ppm add 110 mL of SPA CALCIUM per 1,000 L of spa water to raise
hardness by 50 ppm.
3. Pour solution directly into spa water with the spa in operation.
4. Wait 15 minutes before using spa.