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Thread: Metal Stains....

  1. Back To Top    #1

    Join Date
    May 2014
    United States

    Metal Stains....

    For 3 months these orange/yellow stains have been popping up all over the bottom of the pool. Tried ascorbic acid treatment which had no effect. Thought maybe the rebar was too close to the surface...then found the culprit. A roofing nail from nearby construction has been pushed around the bottom of the pool staining as it goes and blending in with the stains so we never saw it when brushing. The roofing nail is gone now - but there are probably 50-60 individual metal stains on the plaster. What's the best course of action here? This thing has been floating around for months now so god knows how much metal has seeped into the water.

    The particulars:

    Colored Gemstone plaster
    Ph - 7.5
    FC - 2
    TA - 80
    CYA - 40 (being raised now that winter is over)
    Calcium - 210
    Salt - 3200
    ~25k gal IG Gunite w/ Gemstone Quartz Plaster & Spa, Pentair Intelliflo Variable Speed Pump (Main), Boost Pump, and Whisperflo Pump (Waterfall/Spa), Jandy Pro Series Salt Water Chlorinator; stamped concrete deck, natural rock waterfall

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

    Re: Metal Stains....

    Try placing a vitamin C tablet directly on one of the stained areas. If that removes the stain in that local spot, then it is possible to get an ascorbic acid treatment to work.
    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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