APi 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|
|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.
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