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When I tested it this afternoon I get: FC 3 TC 3 pH below 7.0 (my test kit only goes down to 7) CYA looks closer to 50, somewhere between 40 and 50 for me

We opened up our pool a few weeks ago and started the usual of getting any debris out and balancing it. Once we got all the debris and began shocking it with liquid chlorine, we noticed that it went yellow in color. I thought it might be mustard algae so we upped the level of shock and it...