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Makes sense about the scale being logarithmic. Thanks for the feedback.

It was between 20 and 30, closer to 20. But sure, round it up to 30? In any case, sounds like disolving in cold water is not a problem, just likely to take a bit longer. Thanks.

Due to some heavy rains this winter and draining off excess water, my CYA level has drifted down, now at 23 ppm. I plan to bring it back up to 40 with dry stabilizer, but I’m wondering how water temp will affect disolving the CYA using the sock method. Should I wait until temperatures rise and...

Sorry, typo on the PH, it is 7.6. Baking soda definitely has raised my PH and it also raises the TA, which was low as well. I'm using the TF-100 test kit to test my numbers. I realize that Jack's sequesters the copper, I was under the impression that it would get picked up in the filter and...

I have been using chlorine tab to chlorinate my pool, and probably have been over doing it. After neglecting to test chemicals for a few weeks, I found that I had a high concentration of copper and low Ph. The FC reading with a K-1000 test was off the chart (orange/reddish color). I have since...