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Increases hardness in spa water. Calcium+ is the ideal product to prevent and stop corrosion of equipment while increasing calcium hardness in your spa water.

Directions for use:

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 110mL of Calcium+ per 1,000L of spa water to raise hardness by 50 ppm.
3. Pour Calcium+ directly into spa water while the spa is in operation.
4. Wait 15 minutes before using spa.