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I just got my TF-100 and my results are: FC: .5 CC: .5 TA: 80 PH: 7.5 CYA: 40 What I need help with is that I can't keep FC levels around 3 for more than 3 or 4 days. I assumed my CYA was super off and was causing the FC to be "eaten", but this does not appear to be the case. Any ideas...

I have a 15x30 above ground pool with a new replacement liner, not exactly sure what brand or thickness. I just want to verify that adding bleach is safe for the liner. It's probably a coincidence (pollen season?), but the last 2 times I added bleach (use Pool Math) to raise FC to 3 there was a...