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Thread: New to testing..

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    Join Date
    Jun 2012
    Location
    Boardman, Ohio
    Posts
    11

    New to testing..

    Hi. Our pool was installed about a week ago so I'm really new to this pool ownership and testing thing. I'm using the TF100 test kit and I've had a lot of fun reading through pool school and playing chemist with the kit.

    Yesterday's results:
    pH 8.2
    FC .5
    TA 70
    CH 140
    CYA 0

    The black dot never disappeared. This is a new pool with new water and I do have CYA hanging in a sock near the return. Will it take a while to register on the test?

    After that test, I used the pool calculator and added muriatic acid and liquid chlorine as recommended.

    Today's results:
    pH 7.2
    FC 3
    TA 40

    The pool calculator is recommending that I add 127oz of baking soda by weight or 107oz of baking soda by volume.

    The pH and TA thing confuses me a bit..maybe I should have paid more attention back in those high school and college chemistry classes. Anyway, will adding that baking soda to raise the TA affect the pH?

    Does it seem like I'm doing what I should at this point?

    The water looks crystal clear and sparkly. My 8 year old is so excited about swimming but it's been super cold here..highs in the 50s..yikes and our gas heater isn't hooked up yet. No swimming in the very near future for us but I want to make sure that I'm doing a good job with getting this started and maintaining.

    I am so impressed by this forum and how kind and helpful people are here!
    24' x 54" AG Sharkline Matrix.
    Pentair PNCC0150OF2160 Clean & Clear 150 Sq' Cartridge Filter System with 1-1/2HP Dual Speed OptiFlo Above Ground Pool Pump
    Installing May 2013.
    Deck to be installed soon after..I hope.

  2. Back To Top    #2

    Join Date
    Feb 2008
    Location
    Denton, TX
    Posts
    5,061

    Re: New to testing..

    Cya takes a while to dissolve. We reccomend waiting a week before checking CYA levels after additions. As for your TA, 40 is low. I would use the pool calculator and add enough baking soda to get the TA up to around 70.

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    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: New to testing..

    Welcome to the forum.

    Yes, the CYA can take 3-5 days or so to register so just assume the dosage you put in is in there.

    Your TA is quite low. The baking soda will raise it just fine (shoot for about 70 or so) and it will have no appreciable affect on your pH.

    You are off to a very good start. The testing is a bit daunting at first but you will be a pro over the next couple of weeks. Did you calculate the CYA dosage to about 40 ppm?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: New to testing..

    Quote Originally Posted by lisam00
    Hi. Our pool was installed about a week ago so I'm really new to this pool ownership and testing thing. I'm using the TF100 test kit and I've had a lot of fun reading through pool school and playing chemist with the kit.

    Yesterday's results:
    pH 8.2
    FC .5
    TA 70
    CH 140
    CYA 0

    The black dot never disappeared. This is a new pool with new water and I do have CYA hanging in a sock near the return. Will it take a while to register on the test?
    Yes. Could take up to a week. Save your reagent and just assume its in there and try again next week.

    After that test, I used the pool calculator and added muriatic acid and liquid chlorine as recommended.

    Today's results:
    pH 7.2
    FC 3
    TA 40

    The pool calculator is recommending that I add 127oz of baking soda by weight or 107oz of baking soda by volume.

    The pH and TA thing confuses me a bit..maybe I should have paid more attention back in those high school and college chemistry classes. Anyway, will adding that baking soda to raise the TA affect the pH?
    Baking soda doesn't affect pH very much. Hint: look at the bottom of Pool Calculator. It has a line titled "Effect of Adding Chemicals." You can see for yourself what should happen. As an aside, why did you lower pH to 7.2? Human tears are around 7.4-7.5. What did you target? Because if you overshot your target, you might need to reduce the volume you have entered in the pool calculator.

    Does it seem like I'm doing what I should at this point?

    The water looks crystal clear and sparkly. My 8 year old is so excited about swimming but it's been super cold here..highs in the 50s..yikes and our gas heater isn't hooked up yet. No swimming in the very near future for us but I want to make sure that I'm doing a good job with getting this started and maintaining.

    I am so impressed by this forum and how kind and helpful people are here!
    You are doing great!

    I'm thoroughly pleased that you took the plunge and bought the test kit. By the time the water's warm enough for your kid (it will still be too cold for you ) you will have it all figured out.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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