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Okay, im at my wits end with this black algae in my pool. I have kept the pool at shock level or very close by for a week now. (there are some times it slipped below recommended shock level but not for more than a couple of hours) Anyways my black algae has developed a force field. I have...

Been shocking for a week now and I am still losing a lot of chlorine overnight. Example, last night after the sun went down my FC was 24.5 This morning, it was 12 The pool is crystal clear other than a few spots of black algae that won't die. Will that much clorine be lost to those few spots...

Im in the process of shocking the pool. I bought the test from leslies that was recommended, but it only measures FC up to 5. I had to take in a test sample to Leslie's to determine when I got to FC 16 as recommmended. I want to do the overnight test, however I can't exactly do the test if I...

I've been having a issue with algae on the sides of the pool. Had one of those cheapo test that indicated chlorine was just fine. Came here and figured out that the test was useless and to get a real tester. Bought the recommended tester and got these results: FC = 0 (might be the reason...