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Thread: blue crystal stains on plaster

  1. 08-06-2006 05:49 PM #1
    mdswimmers
    mdswimmers is offline --General User-- mdswimmers 0
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    Unhappy blue crystal stains on plaster

    We have a 1 year old gunnite - plaster pool. I am getting blue crystals forming on the plaster. Sometimes they are in spots, and sometimes they are in veins. They are rough to the touch. I had my water checked, and they said everything is normal. The plaster around the crystals is white with a dingy brownish color surrounding that. It is spreading fast!
    Cholrine 1
    pH 6.8
    Alkalinity 80
    Cyanuric Acid 30-50
    What can I do?
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  2. 08-06-2006 11:28 PM #2
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    aylad
    aylad is offline SuperMod Emeritus Burfle Ringer aylad 4 stars aylad 4 stars aylad 4 stars aylad 4 stars aylad 4 stars aylad 4 stars
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    Default Re: blue crystal stains on plaster

    I don't know about the blue crystals, but you definitely need to get your Chlorine up to a minimum of 3, and raise your pH to at least 7.2...

    Janet
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