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Thread: calcium hardness

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    calcium hardness

    I have a 20,000 gal. inground vinyl liner pool. Do I have to worry if my
    calcium hardness level is low? Also, I just opened my pool yesterday and along
    the crease of the liner(where the wall & bottom meet), I have what looks like some rust stains. I shocked the pool and look like everything else is balanced. Any suggestions what to do?


    Pool: 20k gallons, converting to SWG from Baqua, sand filter, vinyl liner.

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    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: calcium hardness

    Low Calcium = no problem.

    Rust stains can be lifted by covering them with vitamin C tablets. Organic stains, from rotting leaves and such, will bleach out eventually.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: calcium hardness

    No worry about low CH.

    Try crushing up a vitamin C tablet and putting it on the stain to see if it goes away.

    Why did you "shock" the pool? Did you follow the Shocking Your Pool PROCESS?
    Jason, TFP Moderator
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