Susanj Posted May 13, 2018 Report Share Posted May 13, 2018 From what I understand, Pool Calc is a device that tests the water and tells you, based on the readings, what to add. (Or maybe you test it yourself and input the values). Can it be used for a hot tub or is there a different one that can be used for a hot tub? Quote Link to comment Share on other sites More sharing options...
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