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Thread: Large drop in Calcium Hardness..Should I correct it?

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    Large drop in Calcium Hardness..Should I correct it?

    We have had lots of rain down here in FL. and my latest test with a taylor 2006 and the local pool store confirmed my CH @ 180. Last season my CH was 320 but I have taken a lot of water out of the pool in the last 3 weeks. I used the pool calculator and the it gives me a CSI of -0.27 balanced.

    Here are my numbers and pool facts.
    FC 5
    Ph 7.6
    CH 180
    TA 110
    CYA 80
    Salt 3200
    Water temp 85F
    15000 gal pool, plaster, SWG., cartridge filter.

    The CH is under my goal but should I correct it or will time correct it for me?

    I have also started using Polyquat 60 @ 4oz a dose once a week during these frequent heavy rains for the last 3 weeks. Could this have any affect on the CH?

    On a side note I have tried to lower my TA by dropping the ph with Muratic acid and aerating with little success.



    Thank you
    15k Diamond Brite, Aquarite SWG, 1.5hp StaRite, Hayward Star Clear 17502, AquaCal heat pump, Pentair Great White pool cleaner

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    Guest

    Re: Large drop in Calcium Hardness..Should I correct it?

    Quote Originally Posted by whowouldfigga
    Here are my numbers and pool facts.
    FC 5
    Ph 7.6
    CH 180
    TA 110
    CYA 80
    Salt 3200
    Water temp 85F
    15000 gal pool, plaster, SWG., cartridge filter.

    The CH is under my goal but should I correct it or will time correct it for me?
    The only way it will rise is if your plaster starts to dissolve which is not what you want.
    I have also started using Polyquat 60 @ 4oz a dose once a week during these frequent heavy rains for the last 3 weeks. Could this have any affect on the CH?
    It shouldn't
    On a side note I have tried to lower my TA by dropping the ph with Muratic acid and aerating with little success.
    What was not successful? If you drop the pH, test the TA, aereate until the pH rises and repeat the process untill the TA tests to where you want it it is always successful. It might take many repetitions untll the TA starts to move and more until it's on target but the process always works. Leaving your TA at 110 ppm is going to lead to pH stability issues for you.

    I find it very strange that your CH lowered from the rains but your CYA and salt did not. Something is not right here!


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    Re: Large drop in Calcium Hardness..Should I correct it?

    Quote Originally Posted by waterbear
    Quote Originally Posted by whowouldfigga


    I find it very strange that your CH lowered from the rains but your CYA and salt did not. Something is not right here!
    [/color]
    You are very observant. My CYA and Salt were high. My CYA was @120 and my Salt was at 3200 before the rain started. I took advantage of the rain. I dumped the water and got my CYA to 80 and my salt dropped to 2700. I added 50lbs of NaCL and brought it up too 3200. Unexpectedly I lost my CH as well.

    Should I try to correct the CH or the TA first.
    15k Diamond Brite, Aquarite SWG, 1.5hp StaRite, Hayward Star Clear 17502, AquaCal heat pump, Pentair Great White pool cleaner

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    JasonLion's Avatar
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    Re: Large drop in Calcium Hardness..Should I correct it?

    There is need to do anything right away, but if your test results are right you will need to add CH at some point.

    I wouldn't worry about the TA level unless you are having problems with PH rising too quickly.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Guest

    Re: Large drop in Calcium Hardness..Should I correct it?

    Quote Originally Posted by JasonLion
    There is need to do anything right away, but if your test results are right you will need to add CH at some point.

    I wouldn't worry about the TA level unless you are having problems with PH rising too quickly.
    With a SWG I suspect you will.

  6. Back To Top    #6

    Re: Large drop in Calcium Hardness..Should I correct it?

    Waterbear is correct. My PH rises quickly. Next time we have a forecast of rain for a few days (aeration) I will try and lower my TA again.

    Thanks for your help guys.
    15k Diamond Brite, Aquarite SWG, 1.5hp StaRite, Hayward Star Clear 17502, AquaCal heat pump, Pentair Great White pool cleaner

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