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Thread: CH shot up but all else is good, suggestions?

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    Join Date
    Apr 2016
    Location
    Carlsbad, CA
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    106

    CH shot up but all else is good, suggestions?

    Re-plastered with quartzite 3 weeks ago. Been testing a week or two on my own, and had pretty good results. Put in some more CYA through sock method yesterday.

    Morning readings:

    FC 6
    CC 0
    CH 525
    TA 120
    CYA 50
    PH 7.5-.6

    How did my CH rise so much? Not sure I was accurately testing in the past, and I know we have issues with calcium in my area, but sheesh. Pool math tells me to drain 1/2 my pool, but everything else is fine, any suggestions?
    Carlsbad, CA
    17,500 gal rectangular Midnight blue Quartzscape, Pentair Intelliflo, Poolstore Vergnugen, Aquarite Salinator renovated 2016 Spring

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    Carlsbad, CA
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    Re: CH shot up but all else is good, suggestions?

    BTW, just tested water out of the tap is 250. . . .
    Carlsbad, CA
    17,500 gal rectangular Midnight blue Quartzscape, Pentair Intelliflo, Poolstore Vergnugen, Aquarite Salinator renovated 2016 Spring

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    duraleigh's Avatar
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    Sebring, Florida
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    Re: CH shot up but all else is good, suggestions?

    It's the new plaster in your pool shedding calcium. Don't quote me on this but I think some of it is in solid form (are you still brushing the sides?) and will get caught up in your filter - so your next CH test in a couple of weeks MIGHT be lower. No promises, let's see. don't drain anything.

    Meanwhile 525 CH is not so bad....many folks operate even higher but a good way to counteract it is to keep you pH a bit lower (7.3 - 7.4) and NEVER let it get over 8.

    Your other test look pretty darn good. Congratulations for keeping chlorine in your pool.....that's where most people fail

    Are you swimming in it yet?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Apr 2016
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    Carlsbad, CA
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    Re: CH shot up but all else is good, suggestions?

    Thanks Dave, yes, been enjoying it for a couple weeks now, the replaster was actually almost a month ago now. Yes to brushing, and I have a pool vac in there too. I have yet to put any muriatic in, but was thinking of doing so just in case, pool math doesn't say I need any, so might just do a little dose to push down my pH.
    Cheers,
    Joel
    Carlsbad, CA
    17,500 gal rectangular Midnight blue Quartzscape, Pentair Intelliflo, Poolstore Vergnugen, Aquarite Salinator renovated 2016 Spring

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    bdavis466's Avatar
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    Aug 2014
    Location
    Riverside, CA
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    Re: CH shot up but all else is good, suggestions?

    Your acid startup was very aggressive and dissolved some of the plaster near the surface. This is very common with that type of startup, and if I remembers yours correctly, they added a lot of acid.

    Your CH level is fine for now. I'd suggest you lower the TA some. Your pH is fine right now but will be on the rise quickly.
    -Brian-
    33K Pool/Spa, Pentair Equipment
    POOL BUILD
    Davis Custom Construction - Home Page

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