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Thread: see if you guys can help me out here

  1. #1
    Join Date
    May 2010
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    Exclamation see if you guys can help me out here

    my pool is a 20000 gunite inground
    my plaster job needs too be redone
    every place that the plaster cracks off
    and it's down to the bare cement I notice
    some black substance almost like algea. when i
    brush it goes away or get alot lighter and i can
    almost see some green algea getting dispearceing in
    the water, but other than the spots without plaster, the pool
    and the water are fine, any thoughts to get rid of the stuff

    ph 7.3
    ta 100
    cl 3ppm
    cya 40

  2. #2
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    Default Re: see if you guys can help me out here

    Take your chlorine level up to 15 and try and hold it there without letting it yo-yo up and down. Test your water 2 or better yet, 3 times per day, and each time, add enough chlorine to raise the cl back up to 15. Also continue brushing the pool and run your pump 24/7 while you are trying to clear this up.

    By the way, what type of chlorine are you using? Your cya is currently at 40 which in my opinion is perfect and you don't need any more. Trichlor or dichlor both are stabilized and will cause your cya to continue to go higher which you don't want. Also, trichlor in particular is very acidic and will drop your pH. 7.3 is fine but on the low end of where you want it.

    Can you also post a calcium hardness reading?

  3. #3
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    Default Re: see if you guys can help me out here

    calcium is 320, but i also forgot to say that the tile which is just on the top three inches
    around the pool also has some of the black substance algea just on the grout lines, but now everywhere just here and there.

    After we swim today i'll load up on bleach and shock it for a day.

    To watermom the chlorine i'm using is bleach but i have two 3 inch pucks left in the skimmer i dont plan to buy anymore though.

  4. #4
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