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    Something is wrong

    Good news. The stain disappeared. Was worried for a minute. Thanks for the comments everyone. I will definitely take Dave's advice and NOT add chemistry like that again!
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    Something is wrong

    Shock- HTH brand (47.6% calcium hypochlorite) Tester - used HTH 6 way test strip and Taylor DPD chlorine tester. Both read ~1.5 ppm. I just read something that suggested that calcium hypochlorite mixing with metal (copper or iron) could turn a pool surface bottom. Could this be the issue? I...
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    Something is wrong

    I have SWG pool. 25k gallon. Just tested levels FC-1.5 TA-120 PH-8 Calcium-200 CYA:30-50 Had a heavy rain a couple of days ago, so added some shock. PH a little high, so added some muriatic acid right after shock. A couple of minutes later I noticed a dark "stain" at the bottom of the pool. It...
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    Hello TFP

    Thanks for accepting my membership. Lots of great information on the site.