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Yes, I did the dpd test for the chlorine measurement. I haven't used the comparator for chlorine measurement. I've been keeping the chlorine that high because I was going for 15% of CYA, which I thought was correct. I have my SWG set to 20%, which keeps it that high. Now I'm realizing that's...

I noticed recently that when I measure the pH using the kit my pool builder gave me, I get different results than using the tf-pro. Using the pool builder's kit, which uses a chlorine neutralizer prior to the pH test solution, the pH looks pretty good. I'd say 7.7 or 7.8. Using the tf-pro, it...