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Thread: Yellow stains on stairs and liner

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    Thumbs up Yellow stains on stairs and liner

    Hi everyone I'm new to trouble free pool. I am having a nightmare problem with what I believe to be metal stains. I bought my house in December 2013 and it came with a vinyl liner 30,000 gallon pool. It had a ripped cover and years of leaves and algae in the pool. I used this site step by step to get rid of both and had a crystal clear pool in weeks. I came home from work one day and to my dismay noticed everything white in my pool was school bus yellow. I could also see the liner was stained. I checked the forums and did the vitamin c test and determined it was metals. I then did the absorbic acid treatment and everything was great. The problem is every time I slowly add bleach back into my pool the stains all come back. I'm so stressed out over this pool and need help badly. I've spent tons of money on the absorbic acid and sequestrants. Here are my levels:
    pH 7.2
    Cya 90
    TA 90
    Fc 0


    30,000 gallon vinyl liner Hayward 1.5 hp pump sand filter

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    Re: Yellow stains on stairs and liner

    Welcome to TFP!

    How are you getting those test results? If you have been following the methods recommended on this site, you will notice that we have some specific recommended test kits.

    If your reading of CYA 90 is from one of our recommended test kits, then we would advise a partial drain and refill of your pool before tackling anything else.

    Also, we encourage members to add their city/state to their profile rather than just indicating "United States".
    This allows us to take your climate, water prices, water hardness and water table level into account when giving advice.

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    Butterfly's Avatar
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    Re: Yellow stains on stairs and liner

    Welcome to TFP

    Do you use well water or municipal water for your pool?
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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  4. Back To Top    #4

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    Re: Yellow stains on stairs and liner

    I use municipal water. I test my pool with the tf-100. And I'm from St. Louis,Missouri.

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    Butterfly's Avatar
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    Re: Yellow stains on stairs and liner

    Have you added any algaecides containing metals?
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

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    Mod Squad kimkats's Avatar
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    Re: Yellow stains on stairs and liner

    Is there anyone else that could have tried to "help" you with the pool? Like buying and adding a product with metal in it? Most algaecides have copper so...........

    Have you had the water tested for metals?

    Just throwing out ideas.........

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

  7. Back To Top    #7

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    Re: Yellow stains on stairs and liner

    I think that may be how the metals got into the water but I'm not sure if their were metals in the algaecide.

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    Re: Yellow stains on stairs and liner

    I've taken my water to be tested at Leslies and it didn't test positive for whatever metals they can test for.

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    Butterfly's Avatar
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    Re: Yellow stains on stairs and liner

    Quote Originally Posted by hookem87 View Post
    I've taken my water to be tested at Leslies and it didn't test positive for whatever metals they can test for.
    Well, they were deposited on the pool and not in the water, so they would not show up on test. Plus, pool store tests are often wrong.

    I'm thinking that if you have had that much trouble, you might need to do another AA treatment, grab the stains and do a drain/refill. You would need to leave at least a foot of water in the shallow end. Essentially dumping most of the water with the metals in it. But, let's wait and see what others have to say.

    What is the cost of water in your area?
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  10. Back To Top    #10

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    Re: Yellow stains on stairs and liner

    I'm not sure but I can do a drain/refill no worries. What about the fact that I have a vinyl liner. And I have done the AA treatment three times now.

  11. Back To Top    #11
    Butterfly's Avatar
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    Re: Yellow stains on stairs and liner

    Quote Originally Posted by hookem87 View Post
    I'm not sure but I can do a drain/refill no worries. What about the fact that I have a vinyl liner. And I have done the AA treatment three times now.
    Let's wait for some others to chime in with ideas
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  12. Back To Top    #12
    JasonLion's Avatar
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    Re: Yellow stains on stairs and liner

    After using AA to remove the stains from the pool surface, you need to use sequestrant to bind up the metals so they will not immediately re-deposit as stains. Sequestrants based on HEDP, phosphonic acid, or phosphonic acid derivatives are the most effective. ProTeam's Metal Magic and Jack's Magic The Pink Stuff (regular), The Blue Stuff (fresh plaster), and The Purple Stuff (salt) are some of the top sequestrants. You can also find many other brands with similar active ingredients, some of which are noticeably less expensive.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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  13. Back To Top    #13

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    Re: Yellow stains on stairs and liner

    I did do that three times now. I followed the AA process off of this site each time. All three times my yellow stains have come back.

  14. Back To Top    #14
    JasonLion's Avatar
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    Re: Yellow stains on stairs and liner

    They you are not using enough sequestrant, or are using the wrong brand of sequestrant. When you see the slightest sign of stains returning, you need to add more sequestrant. And you also need to add regular maintenance doses of sequestrant to maintain the sequestrant level.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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  15. Back To Top    #15

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    Re: Yellow stains on stairs and liner

    I am using metal free and have been using more than the recommended dose and have added it each time I began to see stains. I can't afford to buy it this many times along with the AA. is there any other way to remove the metals?

  16. Back To Top    #16
    JasonLion's Avatar
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    Re: Yellow stains on stairs and liner

    Metal Free is not one of the sequestrants we recommend using. I strongly recommend using something based on HEDP, phosphonic acid, or a phosphonic acid derivative.

    There is no reliable way of removing the metals, though there are ways that work some portion of the time. When these approaches do not work, which is fairly often, they cause the metals to redeposit as stains. The most common approach to removing metals is to rapidly raise the FC level to a quite high level, hopefully causing the metals to precipitate out in a form that can be filtered out. This of course requires that the metals be in the water, rather than already in stains, and can result in the metals simply redepositing as stains.
    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

  17. Back To Top    #17

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    Re: Yellow stains on stairs and liner

    Can you recommend something that I can possibly buy at a store because I'm afraid to wait a few more days if I buy one online.

    - - - Updated - - -

    My CYA is 90 what's the best way to lower that with a vinyl liner pool? Maybe I can get metals out while I'm draining?

  18. Back To Top    #18
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    Re: Yellow stains on stairs and liner

    Online or in the store, the recommendations are the same. You just have to call around and see who has them.

    Only partially drain your liner pool. Increments of 25% are the safest bet. A refill is a great way to rid yourself of metals, but you have to have fill water without metals or much of them to do any good. If you have another source that would be your best choice.

    Metals are extremely difficult to deal with because it is so hard to remove them. Sequestrants are very expensive as you are painfully aware.
    TFP Moderator
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  19. Back To Top    #19
    Butterfly's Avatar
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    Re: Yellow stains on stairs and liner

    Does the muni water contain iron? You should be able to get a water report and confirm this.

    If you would be refilling with iron laden water, the metals saga would continue. ie, expensive sequestrants.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  20. Back To Top    #20

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    Re: Yellow stains on stairs and liner

    Since you had clear water until after you added an algaecide (from the way I read it) then that is probably the culprit, not your fill water. You'll need to get the water replaced a little at a time until you have it down enough it's not causing the staining. I would do a treatment to remove the staining and sequester it then do as big of drain/refill as you safely can. Others might recommend a different process to do it though so wait for other opinions.

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