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Thread: Staining in Pool having trouble please help

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    Staining in Pool having trouble please help

    Hi guys and gals,

    This is my 1st post on here, I bought my 1st house last year and I have been learning all I can about pool maintainance.

    I am having a problem with staining in my pool, in the past the PH has been on the high side, prob because i have a SWG.

    The water is currently balanced except for being a little high on alkalinity.

    I have brownish stains on the floor and walls of my pool, please see pics.

    I cam trying to determine if these are metal stains or organic stains, I shocked the pool yesterday and did a super chlorinate to get the chlorine levels up to fight the stains, assuming they are organic, however i dont believe they are now, because after yesterday there is no change in the appearance of the stains.

    I have also tried to put vitamin C against he stains and did not really see any improvement or reaction, so Im a bit puzzled.

    I thinking the next move will be the ascorbic acid treatment and see what happens, the other option is that I bought 2 bottles of HTH metal control from walmart, it says to add the 2 bottles 64 ounces to treat the stains.

    I dont know what it causing these stains/ scale and they really make my pool look ugly, I dont want to have to drain the pool and do any acid washes if not totally neccessary.


    I live in tucson and we have very hard water here, may contain minerals in it, i dont know for sure.

    Im hoping you guys can recommend some way to test the stains to determine what the best action is.



    Please help!!!!

    The stains are now spreading to most of the pool floor.





    9,000 gallon pool
    In ground Gunite and plaster
    Cartridge Filter
    Hayward 1 HP super II pump

  2. Back To Top    #2
    JasonLion's Avatar
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    Re: Staining in Pool having trouble please help

    Welcome to TFP!

    If you have tried a vitamin C tablet and it didn't help, then doing an AA treatment won't help either.

    Could you post a full set of water test results? That will help us make suggestions about what you can try next.
    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: Staining in Pool having trouble please help

    Hi,

    Thanks for the quick reply

    These are the results tonight

    TH = 200
    PH = 7.3
    FC = 0.5
    TA = 130
    CYA = 50

    The chlorine is low, because i was bringing it down, in anticipation of the AA treatment.

    However, for a long time , the Ph has been high and the salt level very high, due to the house being short sold and not maintained,
    so this history is important to know.
    9,000 gallon pool
    In ground Gunite and plaster
    Cartridge Filter
    Hayward 1 HP super II pump

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    Re: Staining in Pool having trouble please help

    I was thinking my next plan was to add the HTC metal control, the two bottles, then if that didnt work the jacks magic copper control, but im still not sure if its a copper or metal stain, but from what i can tell its not organic, so i assume thats the only other thing it could be...

    Thanks
    9,000 gallon pool
    In ground Gunite and plaster
    Cartridge Filter
    Hayward 1 HP super II pump

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    duraleigh's Avatar
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    Re: Staining in Pool having trouble please help

    A prime principle of BBB is not to toss stuff into the pool hoping something will work. There is a very good chance the stain can be identified first and then treated without using unrelated chemicals.

    How did you test TH?

    I would also suggest bringing your Cl back up until you identify the issue.

    Prolonged high pH frequently results in calcium scale.

    Organic stains seldom disappear in 24 hours.....nor does a shock level of chlorine unless you have organics in the pool.

    If it was my pool, I would simply hold FC levels up very high (around 10ppm) with clorox (not your swg) and watch to see what happens for the next week. I would not be surprised if you find you are consuming a lot of chlorine and the stains, are indeed, organic.

    Even if not, there is no harm in this treatment, it's cheap, and it will give you time to perform an iron test to see if there is any validity to doing an AA treatment.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Mod Squad Bama Rambler's Avatar
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    Re: Staining in Pool having trouble please help

    Have you tried hoding a trichlor puck against the stain? Since the Vit C tab didn't work, I'd try that before you do anything else.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Re: Staining in Pool having trouble please help

    Hi again,

    i appreciate the responses so far, this a great forum, and im relieved to have help from people who really know what they are doing

    I have tried the chlorine puck, and did not really see any difference, how long do I need to leave it on the stain?

    i left it for about 5 mins before and tried to scrub it on the stain, and didnt see any real difference, I can leave it for longer if this may give us some information.

    The Ph was high for a prolonged amount of time, and there is a good chance this has something to do with the stains and scaling on the bottom of the pool.
    I did have a large amount of calcium deposits on the pool tile at the water level that i had to clean off, with a lot of elbow grease.

    i dont know if this would casue the brownish scale/ stains on the walls and floor?

    i can try the vit c again and the chlorine puck and see if anything happens, this is probobly why im so frustrated, because I cant seem to ID the cause of the stains and therefor find a remedy.
    9,000 gallon pool
    In ground Gunite and plaster
    Cartridge Filter
    Hayward 1 HP super II pump

  8. Back To Top    #8

    Re: Staining in Pool having trouble please help

    Also, i hope you guys can see the 3 photos I posted, In the 1st one you can see the scale/ brown stains on the floor and walls pretty well, this is what i want to get rid of, and this is starting to appear in more on the pool floor in the deep end now.

    When i put the chlorine puck on the stain, do i just drop it in on top of the stain?
    What should happen? Will i see an outline of the puck and clear plaster underneath it when i remove it, while the surrounding are will still have the stain?

    I will try this and take before and after pictures to see if it is working
    9,000 gallon pool
    In ground Gunite and plaster
    Cartridge Filter
    Hayward 1 HP super II pump

  9. Back To Top    #9
    Mod Squad Bama Rambler's Avatar
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    Re: Staining in Pool having trouble please help

    The Ph was high for a prolonged amount of time, and there is a good chance this has something to do with the stains and scaling on the bottom of the pool. I did have a large amount of calcium deposits on the pool tile at the water level that i had to clean off, with a lot of elbow grease.
    I think that's a clue right there. It's possibly calcium scale with organic stains embedded. Hold the puck on it a little longer and see what happens.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  10. Back To Top    #10

    Re: Staining in Pool having trouble please help

    I left the chlorine puck on top of the stain for 4 hrs, and when i removed it there was not much change, the stain seemed a little lighter. Not sure what im supposed to see or how long to leave it, others on these posts have said that the chlorine puck was like "an eraser" on the stain, thats not whats happenning to me maybe i need more patience, in the meantime i guess i should get my chlorine levels up, if im not doing the AA treatment
    9,000 gallon pool
    In ground Gunite and plaster
    Cartridge Filter
    Hayward 1 HP super II pump

  11. Back To Top    #11
    Mod Squad Bama Rambler's Avatar
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    Re: Staining in Pool having trouble please help

    If you left it that long and it didn't make much of a difference I don't know what to think. It still could be calcium scaling and it's going to take a while to remove.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  12. Back To Top    #12

    Re: Staining in Pool having trouble please help

    Im not sure what to think either, i was hoping there was a way to determine for sure, what type of stain it is, then a plan to remove them.
    9,000 gallon pool
    In ground Gunite and plaster
    Cartridge Filter
    Hayward 1 HP super II pump

  13. Back To Top    #13

    Join Date
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    Re: Staining in Pool having trouble please help

    Jack's has stain identifier kits or if you talk with them on the phone they can help you identify the stain and suggest an appropriate stain removal product. However, I wasn't clear on whether you tried using ascorbic acid / vitamin C tablet on the stain -- I did see that you wrote that a Trichlor puck didn't fade it. The AA will more readily remove iron stains though can somewhat help copper as well.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    Mod Squad zea3's Avatar
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    Re: Staining in Pool having trouble please help

    You could use a length of pvc long enough to reach one of the stained areas and pour about a cup of muriatic acid on the stain. If the stained area goes away then you are dealing with calcium scale.

    It looks like your posted test results came from a strip, is this correct? If so take a water sample to a pool store and have them test the water. Be sure they test for calcium and not just total hardness. Also ask them to check for metals if possible. Post the results here.

    The best way to take control of your pool is to have a high quality test kit such as the Taylor K2006 or the TF 100. With a high quality test kit you will be able to run accurate tests as frequently as needed in order to balance the pool correctly.
    TFP Moderator
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    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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  15. Back To Top    #15

    Re: Staining in Pool having trouble please help

    Hi Guys,

    quick update, since raising my chlorine levels and applying the chlorine puck for an extended period of time on the stains, they seem to have faded somewhat.
    This must be an indication that they are in fact organic and or dirt stains, with calcium embedded as someone mentioned before.\
    I will post pics of the current view of the stains shortly.

    Do you guys have any advice for the best plan to remove these stains once and for all?

    Thanks
    9,000 gallon pool
    In ground Gunite and plaster
    Cartridge Filter
    Hayward 1 HP super II pump

  16. Back To Top    #16

    Join Date
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    Re: Staining in Pool having trouble please help

    I think I'm dealing with the same issue as the original poster -- those photos look very similar to my situation (see my thread scaling-t35405.html)

    I left a chlorine puck on some affected areas for about 4 hours and noticed considerable improvement. But, now I'm not sure how to attack the overall pool now that I think I'm dealing with a somewhat embedded organic stain (note in my original tread, brushing aggressively with a wire brush was not successful).

    Thanks
    27,000 gallons - SWG
    DE filter
    IG
    Plaster

  17. Back To Top    #17

    Re: Staining in Pool having trouble please help

    Did you figure out what was causing it and how to fix it? I think we are experiencing the same problem: post592067.html#p592067

    Thanks@

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