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Thread: Re: Stains on replastered pool

  1. Back To Top    #1

    Join Date
    Jun 2014
    Plano, Texas

    Re: Stains on replastered pool

    Moved from Please start your own thread when you have a question. Butterfly

    Quote Originally Posted by JasonLion View Post
    Try placing a vitamin c tablet on one of the stained areas and see if the stain clears up in that spot.
    I have a similar problem. About 6 weeks ago my landlord replastered the pool. No after care was done that I know of. I could see white powder at the bottom of the pool. The main drain had been sealed off years ago due to rupture. No brushing, no vacuuming. I did find 2 empty bottles of muriatic acid in the recycle bin so I assume that is what they did. I have since purchased a brush, a vacuum and a skimmer and have cleaned as best I could and the yellow stains are still there. I tried the vitamin c trick and it appears to do nothing. Yesterday I tested the water and the FAC and TAC were both at a 2, the pH was 7.4, Calcium Hardness was low at 150 ppm, CYA was at 35, the TA was a 40 and I added 10lbs of Alkalinity Up from Leslie's, it called for 12 1/2 lbs, the TDS was 900, and the phosphate level was at 200. From what I have read these stains were caused by poor curing. What can I do to get rid of them? I am also seeing what appears to be black spots.
    Thank you.

  2. Back To Top    #2

    Join Date
    Mar 2007
    San Rafael, CA USA

    Re: Stains on replastered pool

    Welcome to TFP!

    I'm sorry no one responded yet. You should probably try and keep your FC from dropping below 3 and with your low CYA you'll probably lose a lot of chlorine from sunlight. If you have stains from poor plaster workmanship I don't know how to fix that. Perhaps someone with more knowledge in that area can help.
    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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