No, it's a product of using TriChlor tablets that release 6ppm of CYA for every 10ppm of chlorine. That's why your CYA always tests high. Nothing to do with hard water at all.
Re: Test results on new pool in Tucson
No, it's a product of using TriChlor tablets that release 6ppm of CYA for every 10ppm of chlorine. That's why your CYA always tests high. Nothing to do with hard water at all.
Carl
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