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Thread: High Ph yet Low Total Alkalinity - now what?

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  1. #1
    Join Date
    Jun 2013
    Location
    Maryland
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    Default High Ph yet Low Total Alkalinity - now what?

    Greetings to all

    Glad to be a new member. I just openned my 19' x 44' 40,000 gal. inground pool. It came with a house I've been renovating and was a total wreck. I finally finished a complete rebuild last year - 30yds of concrete deck tearout, new beam band, stone coping, new concrete deck, replaster, all new pump & de filter - a 2 year project. In the end it turned out fine. So - this is it's second season & the 1st time I have openned a pool.

    The chemestry was good @ end of season. I did a shock @ 12 - 13 ppm FC, drained & plugged the lines & put a solid tarp over it. Amazingly the water was clear when I removed the tarp yesterday. To be safe I shocked it again late afternoon - measured 12.5 ppm a w/low CYA of 10 or less 4 hours later. I use a Taylor K-2006 test kit.

    Currently Ph is aprox 8. (FC still @ shock level) Total Alkalinity is 50ppm. The Taylor book calculates about a quart of Muriatic acid for Ph 7.4ish. and 2 lbs.of baking soda for TA 80-90. BTW - Calcium hardness is 260.

    Finally my questions. Should I add the recommended adjustments? Should I wait til FC drops before I adjust? How can adding acid & base be the correct thing to do? Seems like they would cancel each other out.

    Thanks for all help in advance!

    Best regards from chemically challenged,
    Charles
    Last edited by PoolDoc; 06-12-2013 at 10:35 AM. Reason: fix title

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