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Thread: White Stains

  1. Back To Top    #1

    Join Date
    Oct 2008
    Location
    Pennsylvania
    Posts
    4

    White Stains

    Hello. New to forum.

    Getting ready to close my pool this weekend, but within the last few days I've gotten white spots on the bottom of the pool about 4-5 inches in size. They do not brush away.
    Don't know what these are. Have had metal staining over the season, but took care of that with metal out.
    I am concerned that if I let this go, it may become a bigger problem. Any ideas?

    FC-3
    PH-7.5
    TA-110
    CH-300
    CYA-50

    Light Blue fiberglass pool
    San Juan light blue fiberglass pool
    13,500 gallon IG
    Hayward Cartridge Filter
    Goldline SWG

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    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
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    8,617

    Re: White Stains

    Do you use powdered shock or powdered pH adjusters? They can stick to the bottom and be pretty difficult to remove. Your chemistry sounds good. Are the spots in a specific area?
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  3. Back To Top    #3

    Join Date
    Oct 2008
    Location
    Pennsylvania
    Posts
    4

    Re: White Stains

    Thanks for the response!

    I did use Chlor Brite about 10 days ago, but felt I swept the bottom pretty well. I have used PH adjusters earlier in the season, but not within the last few months.
    Spots are on the bottom only, in random places, both deep and shallow.
    San Juan light blue fiberglass pool
    13,500 gallon IG
    Hayward Cartridge Filter
    Goldline SWG

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