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Thread: Brown Stains - Need advice

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    Brown Stains - Need advice

    I bought a house with a pool - and I had the pool open last year - the vinyl liner needs to be replaced as it has slight stains and it is old. However I used the pool last year and enjoyed it. When I opened it this year the liner had brown stains all over. I tested the water for metals and it came up clean - no metals. I put a Vitamin C tablet on the stain and it disappeared immediately. See pictures below of the stains.

    I went to Leslie's and they suggested their stain remover which is basically Ascorbic acid - for $50! - followed by Metal Free to remove the metals from the water. After spending $80 I tried it - and as of this morning nothing (the photos are from after the treatment).

    I can get Jack's Magic - however this will cost me hundreds as I have a 22,000 gallon pool. Any advice before I spend the money? I am looking for something to put in the water to make the stains go away all around the pool versus something I have to rub along the stained liner.

    Any and all good advice would be appreciated. I have a water sample to bring into Leslie's for test results later today if that will help, however the latest tests show the water is in good shape.
    Attached Images Attached Images
    Moved from big city and inherited a pool. So be patient with this novice. 38'x16' vinyl in ground pool 30,000 gallons. Hayward sand filter. Diving board. no heater. TF-100 with XL test kit

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    JasonLion's Avatar
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    Re: Brown Stains - Need advice

    Those are almost certainly iron stains. You should do an AA treatment, directions are here.
    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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    Re: Brown Stains - Need advice

    So how does iron get in the pool? I water has not been refilled - and I tested for iron and none is in the pool.
    Moved from big city and inherited a pool. So be patient with this novice. 38'x16' vinyl in ground pool 30,000 gallons. Hayward sand filter. Diving board. no heater. TF-100 with XL test kit

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    JasonLion's Avatar
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    Re: Brown Stains - Need advice

    It is normal for iron to test at zero when there is significant staining. The iron is currently in the stains, not the water.

    The most common source of iron is well water, though every now and then there is iron in municipal water.
    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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    Re: Brown Stains - Need advice

    I did use AA that I bought from Leslie's and it didnt have an impact. I used 2LBs - the chlorine was high - maybe I try again with lower chlorine and a cheaper non-Leslies AA.
    Moved from big city and inherited a pool. So be patient with this novice. 38'x16' vinyl in ground pool 30,000 gallons. Hayward sand filter. Diving board. no heater. TF-100 with XL test kit

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    JasonLion's Avatar
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    Re: Brown Stains - Need advice

    Follow the directions at the link I gave you. There are several things that can prevent it from working, including high FC levels.
    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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    Re: Brown Stains - Need advice

    Thanks - will do and will report back. Any idea of a local source for AA? I want to get the pool cleaned up for the weekend and would like to find someplace close by. I am in NJ - so any local chain stores or suggestions for a source? The mail order sources charge way to much for overnight delivery. Thanks.
    Moved from big city and inherited a pool. So be patient with this novice. 38'x16' vinyl in ground pool 30,000 gallons. Hayward sand filter. Diving board. no heater. TF-100 with XL test kit

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