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Thread: Question about Calcium Hardness Increaser

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    Question about Calcium Hardness Increaser

    1. How much should you add at a time.
    -I have been told to add around 5 lbs at a time and retest again. Should you add 5 lbs a day or can you add 5 lbs, test, add another 5 lbs and retest?

    2. How long after adding CH increase should you expect to see the results?

    Thanks in advance.
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    JasonLion's Avatar
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    Re: Question about Calcium Hardness Increaser

    The further you are from your goal level, the more you can add at one time. With a 22K gallon pool you can certainly add 10 lbs at a time, and you can also add enough to get half way to your goal level, which ever amount is larger.

    After adding, give it an hour to mix in, with the pump running, before retesting.

    Also, don't raise the PH on the same day you are adding CH.
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    Re: Question about Calcium Hardness Increaser

    Quote Originally Posted by JasonLion
    The further you are from your goal level, the more you can add at one time. With a 22K gallon pool you can certainly add 10 lbs at a time, and you can also add enough to get half way to your goal level, which ever amount is larger.

    After adding, give it an hour to mix in, with the pump running, before retesting.

    Also, don't raise the PH on the same day you are adding CH.
    Thanks. I finally updated my gallons to come out to 13,000. I was way off the first time. With that I will do 5 lbs at a time.
    13,000 Plaster IG Pool approx
    Hayward C5030 Cart Filter
    Emerson 1081 EB653 1.0 HP 1.40 S.F. 3450 RPM
    Pool Calculator, Pool School, TF Test Kits

  4. Back To Top    #4
    JasonLion's Avatar
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    Re: Question about Calcium Hardness Increaser

    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

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    Re: Question about Calcium Hardness Increaser

    I actually decided to break it up into 4 increments. Adding 4 lbs each hour.
    13,000 Plaster IG Pool approx
    Hayward C5030 Cart Filter
    Emerson 1081 EB653 1.0 HP 1.40 S.F. 3450 RPM
    Pool Calculator, Pool School, TF Test Kits

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