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Thread: Stains on pebble sheen after vitamin C

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    Stains on pebble sheen after vitamin C

    So about a week ago I found some spots on the floor of our pool. They were rust colored so I thought I would try vitamin c. It worked but two of the vitamin c pills left some dark spots. One is about the size of a quarter and the other is the size of a fist or so. I searched the forum and found that this could be from copper. I also laid a puck on the stain for quite a while with no change.
    I'm wondering why the other vitamin c pills didnt stain the pebble or if something else could be the culprit. I cant test for copper but will take a sample to Leslies and see what they come up with. I havent used anything in the pool besides pucks, acid and bleach. I put some coins by the stains for size comparison. Any help would be appreciated.
    FC 4
    TC 4
    PH 7.4
    TA 100
    Ch 300
    CYA 100+
    Thanks
    Attached Images Attached Images
    11,872 Gallon IG Shotcrete play pool
    Blue Granite Pebble Sheen finish
    Hayward SwimClear c4025, Navigator & Tristar 1.75hp pump
    2' Powerfall

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    Re: Stains on pebble sheen after vitamin C

    I am not sure about the stains, but I can't help notice your CYA of 100+

    Is that correct? How did you test for it? That is VERY high, and needs to be addressed. Unfortunately, the only way to get your CYA down is by draining and re-filling.

    Pucks add CYA...do you use lots of them?

    If your CYA is really 100, then your pool would require a minimum FC of 7 and a target level of 12.

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    Re: Stains on pebble sheen after vitamin C

    Quote Originally Posted by blakej
    I am not sure about the stains, but I can't help notice your CYA of 100+
    .
    Thanks for the reply. I'm a puck user and thanks to this site I know the pitfalls of using them and the signs to look out for when things start to turn against me.
    11,872 Gallon IG Shotcrete play pool
    Blue Granite Pebble Sheen finish
    Hayward SwimClear c4025, Navigator & Tristar 1.75hp pump
    2' Powerfall

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    Re: Stains on pebble sheen after vitamin C

    I had the water for copper at Leslies and the test strip showed .2 - .5.
    11,872 Gallon IG Shotcrete play pool
    Blue Granite Pebble Sheen finish
    Hayward SwimClear c4025, Navigator & Tristar 1.75hp pump
    2' Powerfall

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    Re: Stains on pebble sheen after vitamin C

    Its been a year now and these stains are still an eye sore. Any help on getting rid of them would be appreciated.
    Current test results
    FC 7
    PH 7.4
    TA 70
    Ch 450
    CYA 40ish
    11,872 Gallon IG Shotcrete play pool
    Blue Granite Pebble Sheen finish
    Hayward SwimClear c4025, Navigator & Tristar 1.75hp pump
    2' Powerfall

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    linen's Avatar
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    Re: Stains on pebble sheen after vitamin C

    They sound like copper stains to me since they "darkened" when the vitamin C was applied to them. Searching of the forum suggests they can be very difficult to remove. Use the google search box at the lower left of the page to search. Here is one thread: http://www.troublefreepool.com/coppe...er-t32612.html
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Stains on pebble sheen after vitamin C

    Thanks for the link to that thread. I ended up buying a CuLator powerpak. The package says it removes copper, iron, manganese, cobalt, nickel and silver. I had the local pool store test the water for metals and they found a little bit of copper .02 - .03ppm but that was it. I wanted to get some opinions about the product I choose before I use it. The directions say to just put the little pouch in the skimmer and let it do its work. Any input would be appreciated. Thanks.
    11,872 Gallon IG Shotcrete play pool
    Blue Granite Pebble Sheen finish
    Hayward SwimClear c4025, Navigator & Tristar 1.75hp pump
    2' Powerfall

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    Re: Stains on pebble sheen after vitamin C

    I expect you will find the CuLator will remove some of the copper that is in solution (which isn't very high in your pool, anyway) but will not really have any affect on the stains.

    I really can't help identifying the stains (sorry) but I don't think the CuLator will remove them.....for that matter, the CuLator does not seem to remove enough metal that's in solution to be particularly useful.

    Let us know if you have a different experience.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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