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Thread: Need help with iron stain

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    Need help with iron stain

    I have brown stains on my steps that I think are iron stain. I have done the absorbic acid treatment and it made no difference. The stains are exactly the same. My pool is filled with well water that is why I think they are iron stain. Right now my test numbers are:
    FC 2
    CC .5
    TC 2.5
    PH 7.2
    TA 190
    CH 110
    CYA 35
    Temp 85

    Any help or suggestions would be appreciated. Thanks.
    SW Florida
    10,000 gal in ground concrete pool
    Pentair Cartridge filter
    Pentair Intelliflow pump
    Pentair SWG
    using BBB for pool chemistry/Lamotte ColorQ tester for daily testing

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    Re: Need help with iron stain

    If holding a vitamin c tablet on the stained area for 20-30 seconds had no effect then the stains are NOT iron. They could be copper but brown copper stains are very difficult to remove. Have your water tested for metals.

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    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Need help with iron stain

    waterbear and other metal gurus....

    I spoke with renee on the phone about an unrelated subject. She tried the vitamin C test and it worked.

    For some reason, her subsequent ascorbic acid treatment was ineffective, however. I asked her to post back up for further advice. I am unable to help.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  4. Back To Top    #4

    Re: Need help with iron stain

    Here is the procedure for the ascorbic acid treatment:
    IF the chlorine is too high when you add the ascorbic acid it will destroy it before it can lift the staining.

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Need help with iron stain

    If you tell us more about how the ascorbic acid treatment went we can give you more specific advice. Did any of the stains disappear for even a short time? What were the FC and PH when you added ascorbic acid? And any other narrative that might give us a clue to what went wrong.
    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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