EZ Spa Cal is a fast dissolving granular product that will safely raise calcium hardness levels in spas and hot tubs. Spas and hot tubs need to be maintained between 300 - 400 ppm to ensure that the water is safe and surfaces and equipment do not accumulate calcium deposits.
- Test spa water to establish calcium hardness level.
- If calcium hardness is below 250 ppm, add EZ Spa Cal as follows:
| Amount to Increase | Gallons of Water | |||||
|---|---|---|---|---|---|---|
| 250 | 500 | 750 | 1,000 | |||
| 10 ppm | 0.5 oz | 1 oz | 1.5 oz | 2 oz | ||
| 25 ppm | 1.25 oz | 2.5 oz | 3.75 oz | 5 oz | ||
| 50 ppm | 2.5 oz | 5 oz | 7.5 oz | 10 oz | ||
Note: If calcium hardness is higher than desired, do not add EZ Spa Cal. Consult your EZ Spa dealer on how to reduce calcium hardness.
