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My CH customarily reads around 280, including a test weekend before last. Then this past weekend, armed with my new speedstir, I tested it again. But the sample never turned blue! Instead, around the normal endpoint, it turned CLEAR. Not even a tinge of any color I could discern. Added more...

Having found that one of the local pool store's 12.5% chlorine is a better deal than the available bleach, and not wanting to handle quite so many jugs, I've decided to start using the former. But this has produced a problem. The jugs in question are 5-gallon returnable, blue plastic. There...

First things first, I suppose - current test results, as best I can get them. FC: >5 ppm TC: >5 ppm pH: 7.8 TA: >500, though the folks who sold me the test kit said that this was unreliable if FC is >5. I suspect pH would be a lot more alkaline than 7.8 if this were true - am I correct? CYA...