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Thread: calcium

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    calcium

    Hello, could someone tell me what causes calcium to rise? thanks


    fc 4
    cc 0
    tc 4
    ph 7.8
    ta 100
    ch 400 and rising
    cya 60

    15000 inground, plaster, d.e. filter

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    JasonLion's Avatar
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    Re: calcium

    Welcome to TFP!

    If your plaster was applied less than a year ago, CH will be constantly going up.

    If you use cal-hypo, it contains calcium.

    If you add calcium increaser (calcium chloride) obviously your calcium will go up.

    If your PH is really low or PH/TA/CH levels are collectively low, calcium will go up. But neither of those are the case based on your numbers.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: calcium

    Thanks for the reply. Is draining some water the only way to lower it?

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    JasonLion's Avatar
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    Re: calcium

    Replacing water or getting a reverse osmosis treatment (which is only available in some areas) are the two ways to lower CH.

    I left off a reason why CH might be high. If your fill water calcium level is medium or high, adding water to the pool to replace evaporation will raise the calcium level.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: calcium

    Is there a time limit to get it down to a better number. i am going to remove the cover to promote more evaporation, unless that will not be quick enough.

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    Richard320's Avatar
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    Re: calcium

    Quote Originally Posted by circus
    Is there a time limit to get it down to a better number. i am going to remove the cover to promote more evaporation, unless that will not be quick enough.
    Evaporation will just make it worse! Water evaporates, Calcium stays behind.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    JasonLion's Avatar
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    Re: calcium

    With CH at 400, you are fine for now. As it goes up you should lower your TA a little. If it keeps going up you need to slowly lower the highest you let PH get. Those two measures will work well until CH is around 600 or 700, and can scrape by with CH up to 1,000 if you are really careful.
    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

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    Re: calcium

    Thank you

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