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Thread: Weird rain

  1. Back To Top    #1
    MomUv5's Avatar
    Join Date
    May 2010
    Memphis, TN area

    Weird rain

    Last night we had a very heavy rain. I woke up to an overly full pool and the water had turned brown. But that's not why I'm posting.

    I had left a 2 qt. plastic pitcher on the pool deck, and it had several inches of rainwater in it. The water was visibly brown which I found surprising. I decided to conduct a small experiment on it, so I added a little bit of Chlorox to see if it would clear the brown color. I assumed that there was some kind of algae that had come in with the rain. Instead, adding bleach made the water a deeper brown.

    I have had serious problems with metal staining and brown water in my pool which were cleared up by doing an AA treatment a week ago. Is there any chance that some of the metal is coming from rain water?

    Newbie with 18 x 36 rectangular pool, estimated at 18,000 gallons, sand filter, inground w/vinyl liner, SWCG

    (Plus a houseful of nearly grown kids)

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Weird rain

    There is certainly a chance, but it seems pretty unlikely. Evaporation won't carry any metal with it, so rain starts pure. Of course it then mixed with airborne dust, which could in theory contain iron, but I have trouble imagining where enough iron would come from to give the effects you describe.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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