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Thread: gem coat loss

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    gem coat loss

    Hi, really glad to have found this site.
    My IG pool was neglected for about 2 years. It had algae problems which were easily solved, but of greater concern is loss of gemcoat due to low/no calcium.
    I have brought the calcium level up to around 350 and the loss of gemcoat has dramatically improved, but a year has gone by and granules of gemcoat are still showing up in my cartridge filter after vacuum.
    My question is "Is there anything I can do to prevent further loss of gemcoat"?
    The pool looks pretty good but I seek to avoid the expense of a future re-surfacing if possible.
    thanks.
    6600 gal IG concrete/gemcoat
    Fresh water
    1 HP motor
    StayRite PLM 100 system 2 filter
    full sun
    Treasure coast, Florida

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: gem coat loss

    Welcome to TFP!

    What is "gemcoat"? Do you have a link or photo?

    Could you post a full set of test results?

    If you have plaster pitting due to low CH levels, you could have ongoing loss of plaster, and anything mixed into it, for quite some time afterwards.
    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

  3. Back To Top    #3

    Re: gem coat loss

    gemcoat is a trade name for the interior finish...diamond brite is another similar product i think...It has the colored granules that give the pool it's blue hue.
    There is no plaster pitting yet, but there is ongoing plaster loss....I have raised the calcium levels to 350 +. I'm wondering if I can do anything to stop further erosion of the plaster and interior finish?
    Latest test readings had
    FC - 5
    CH - 450
    TA - 100
    PH - 7.6
    CYA - 70
    6600 gal IG concrete/gemcoat
    Fresh water
    1 HP motor
    StayRite PLM 100 system 2 filter
    full sun
    Treasure coast, Florida

  4. Back To Top    #4
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: gem coat loss

    The main issue is to properly maintain your PH, TA, and CH levels. Your current numbers are fine, but if they were too low before the problems can continue for some time.
    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

  5. Back To Top    #5

    Re: gem coat loss

    Is there nothing I can do to prevent further erosion?
    6600 gal IG concrete/gemcoat
    Fresh water
    1 HP motor
    StayRite PLM 100 system 2 filter
    full sun
    Treasure coast, Florida

  6. Back To Top    #6
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: gem coat loss

    The only thing you can do is to keep your levels right. They are fine now. Keeping them that way is the best you can do. That won't stop some ongoing loss from previous problems right away, but loss should stop eventually.
    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

  7. Back To Top    #7

    Re: gem coat loss

    Thanks for the reply.
    I had no idea when I bought my house that so much went into proper pool care.
    Glad you are here and thanks again for taking the time to respond to my newb concerns.
    6600 gal IG concrete/gemcoat
    Fresh water
    1 HP motor
    StayRite PLM 100 system 2 filter
    full sun
    Treasure coast, Florida

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