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Thread: stains in gunite/clorine pool

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    stains in gunite/clorine pool

    I have a 5yr old gunite pool that has a very light gray stains all over,mostly solid except in spots it looks like somthing spilled on it and cleaned that area.Tried liquid bleach on steps when water was low also tried vitamin c tabs no diffrence vitamin c tabs actually left brown/yellow stains after 1-2 min. of sitting, any one have a suggestions.Thank you.

    Joe N
    8500 gal. (15'x24') Zodiac AG, Hayward Perflex DE filter system w/ 1 hp pump,
    Nature2 sanitizer, Pentair MiniMax 100K BTU NG Heater
    TF-100 + Oakton pHTestr 30

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    Guest

    Re: stains in gunite/clorine pool

    greyish stains that turned brownish or didn't budge from ascorbic acid (vitamin c) ? Sounds like copper to me! Copper stains can be problematic. First thing to figure out is where the copper came from and to have your water tested to see of there is any dissolved copper in it now or if it's all deposited as stain.
    Have you used copper based algaecides in the past?
    Do you have a mineral system or ionizer?
    Do you have a heater? If so what kind?
    Is there copper in your fill water or do you have copper plumbing and low pH fill water?

    I am going to be blunt with the bad news. In some cases you can treat copper staining in the pool (and I do know a few ways) but often the only cure is going to be an acid wash. This is why prevention of copper staining is better then trying to remove them once they form.

    Post a full set of test results so we can get a better idea of your water right now and then we can figure out how the copper got there.

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    Re: stains in gunite/clorine pool

    Quote Originally Posted by Joe N
    I have a 5yr old gunite pool that has a very light gray stains all over,mostly solid except in spots it looks like somthing spilled on it and cleaned that area.Tried liquid bleach on steps when water was low also tried vitamin c tabs no diffrence vitamin c tabs actually left brown/yellow stains after 1-2 min. of sitting, any one have a suggestions.Thank you.

    Joe N
    Quote Originally Posted by Joe N
    I have a 5yr old gunite pool that has a very light gray stains all over,mostly solid except in spots it looks like somthing spilled on it and cleaned that area.Tried liquid bleach on steps when water was low also tried vitamin c tabs no diffrence vitamin c tabs actually left brown/yellow stains after 1-2 min. of sitting, any one have a suggestions.Thank you.

    Joe N
    Thanks for the help!!!. I did have a water purafication system that leaked small beeds into the pool prob. the reason for copper stains,I am not using system this year.
    I did have water tested an metals are ok at his point.Do you have any ideas short of acid wash that I can try, Thanks again for your help.
    8500 gal. (15'x24') Zodiac AG, Hayward Perflex DE filter system w/ 1 hp pump,
    Nature2 sanitizer, Pentair MiniMax 100K BTU NG Heater
    TF-100 + Oakton pHTestr 30

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    Re: stains in gunite/clorine pool

    Joe,

    Do you have any ideas short of acid wash that I can try,
    Post test results for pH and TA and Calcium Hardness......that might give us another clue.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: stains in gunite/clorine pool

    I will have to get new water test,just added lots of cemicals I will get back asap, Thanks for the help Dave.
    8500 gal. (15'x24') Zodiac AG, Hayward Perflex DE filter system w/ 1 hp pump,
    Nature2 sanitizer, Pentair MiniMax 100K BTU NG Heater
    TF-100 + Oakton pHTestr 30

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    Join Date
    Feb 2009
    Location
    West Virginia
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    216

    Re: stains in gunite/clorine pool

    Is there any way you could post a photo of your stains? It sound similar to what we have seen. Thanks!
    WV Girl

    Custom "L" shape IG gunite pool, 36K gal., main drain, 2 skimmers, 3 returns, hayward heat pump, hayward 1.5hp pump with booster pump, ozonator, 4 cartridge filter.
    one dear hubby, two waterlogged kids, and lots of good times!

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    Guest

    Re: stains in gunite/clorine pool

    Quote Originally Posted by Joe N
    .Do you have any ideas short of acid wash that I can try, Thanks again for your help.
    Not without seeing a full set of test results (and NOT with strips!!!!!!!!! Can't stress that enough!)

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