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Thread: How are these numbers?

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    How are these numbers?

    I am new to the board, but I have been lurking for a while. Today I got my test kit and I was surprised at some of the numbers but I am going to post them along with what I plan to do to adjust them. Could you please let me know if I am on the right track?

    My pool is an Intex 12 x 24 AGP with a SWG. I uncovered the pool last weekend because I read on here last summer that you should open early and close late to prevent problems. The water has been clear but there is some algae on the bottom which I have been brushing to try to get filtered out. I read in pool school that I should use the pool shock for four days which I did today for the first day. This was before my Taylor K2006 test kit arrived in the mail So with that being said, I took a sample of water, then added the one pound bag of shock and then tested the water so please keep in mind that my numbers are preshock.

    FC - 9 ppm
    CC - .5 ppm
    PH - 7.8
    TA - 130 ppm
    CH - 125 ppm
    CYA - 40 ppm

    Do these numbers even sound reasonable (possible)? My plan was to use dry acid to lower the PH and the TA but I need to go back to pool school to figure out how to lower the CC.

    I am guessing that the one pound of shock I added should bump the CYA up more, then should I switch to bleach to try to control the algae?

    Thanks in advance for all of your help!
    Princeton, WV
    Intex Ultra Frame - 12 x 24 AGP
    Intex SWG and Intex Filter

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: How are these numbers?

    CC at 0.5 or lower is alright. As long as it doesn't go up to 1.0 or higher, I wouldn't worry about it. If you do need to lower CC you shock the pool.

    Muriatic acid is less expensive and generally better to use for lowering PH, however it is a little more difficult to handle because of the fumes.

    With CYA at 40, you usually only need FC to be between 3 and 7. However if CC remains above zero, keeping FC a little higher than that can be useful.
    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

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