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Thread: Is this Calcium Scaling?

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    AV8TOR's Avatar
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    Is this Calcium Scaling?

    I never had any problems in the 7-years of moving into this home with this pool. Last spring we had it re-plastered and through the winter I had a bigger problem with hi pH that ever. After taking the cover off I saw this when adding chems but just thought is was a dirt like powder that I have seen before but trying to clean it and its hard. Just looks and feels like hard sand. It's on shallow water mostly like the steps and seats

    I would like to get some feedback before I start my own course of treatment but thinking a no drain acid wash maybe, maybe some ScaleTec too. Any thought of just going low on pH for a couple of weeks?
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    16,000 gal IG Double Roman Plaster Pool (16yrs - plaster redone 2014)
    Pentair FNS-48 DE filter with WhisperFlo 2HP single speed pump
    Polaris 280 robot
    BBB all the way and tested with a TF100 kit
    Pool Calc user

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    AV8TOR's Avatar
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    Re: Is this Calcium Scaling?

    I should have added my numbers
    pH 0s 7.5 but several times during the winter it crept to 8
    TA 80 but had to raise it from 50 this winter - all last season constant 80
    CA is 230 but I am afraid to add if this is calcium scaling
    CYA is 40
    Borates are 40
    FC target is 5 and when I add daily bleach it is 2-3
    16,000 gal IG Double Roman Plaster Pool (16yrs - plaster redone 2014)
    Pentair FNS-48 DE filter with WhisperFlo 2HP single speed pump
    Polaris 280 robot
    BBB all the way and tested with a TF100 kit
    Pool Calc user

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    JasonLion's Avatar
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    Re: Is this Calcium Scaling?

    While I can't say for certain, that does not really look like calcium scaling.

    Does brushing affect it at all?
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    AV8TOR's Avatar
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    Re: Is this Calcium Scaling?

    Quote Originally Posted by JasonLion View Post
    While I can't say for certain, that does not really look like calcium scaling.

    Does brushing affect it at all?
    Brushing does not affect it at all. I have even tried a new stainless steel hand brush. Where there are the blue diamond tiles I see specs that are on there and I can rub the specs off but not on the plaster. I have not tried a pumice stone. There is one step that is 5 or 6" deep and I slowly poured muriatic acid there before the filter came on to see if there would be a fizz and there was not.
    16,000 gal IG Double Roman Plaster Pool (16yrs - plaster redone 2014)
    Pentair FNS-48 DE filter with WhisperFlo 2HP single speed pump
    Polaris 280 robot
    BBB all the way and tested with a TF100 kit
    Pool Calc user

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    AV8TOR's Avatar
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    Fort Worth TX
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    Re: Is this Calcium Scaling?

    Any more thoughts or suggestions
    16,000 gal IG Double Roman Plaster Pool (16yrs - plaster redone 2014)
    Pentair FNS-48 DE filter with WhisperFlo 2HP single speed pump
    Polaris 280 robot
    BBB all the way and tested with a TF100 kit
    Pool Calc user

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