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Just when I thought I had this nailed... Free chlorine is rising at ~ .5ppm for the last several days to 11ppm this morning even with a progressive drop of the SWG from 65% -> 55% -> 45% -> 35%. I have now turned it off. This last week has been sunny with very high UV, and pretty typical...

It is that time of year. We have had two significant rain events in the last month or so and another on its way. As expected, the rain diluted my salt content by about 300ppm on a basis of ~3500. Not unusual as the pool auto-drains with heavy rain. Question: Is it reasonable to assume that...

I am a long time DIY pool owner but new to TFP. Over the last couple of months I got new plaster and new water and attempting to transition completely to the methods and approach defined here. I have stabilized most things at this point, but currently working to get my TA down to recommended...