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Thread: Opening pool chemistry

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    Opening pool chemistry

    OK, I filled my pool today and added my CYA per the calculater (30oz by volume). I added bleach while cleaning the liner and couldnt help but test the pH, CYA and chlorine levels wit my fancy new kit. pH didnt look very close to the lowest color of my kit. I am assuming this is normal considering CYA is acidic and its currently circulating and not completely dissolved. CYA was less than 30...of course it was less than 24 hours since adding it. pH was less than 7.0 from what I can gather. chlorine was 2.5, I used 10ml and it took 5 drops. Should I just retest in the morning?
    1500 gallon vynil liner inground pool
    Hayward super pump, Hayward sand filter
    Just bought the house, think the pool/liner were installed around 1995
    Taylor K-2600 test kit
    Filled with City water, Huntington, WV

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    Richard320's Avatar
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    Re: Opening pool chemistry

    If the TA was also low, like below 50, and the pH is low, your pH is waaaay down into the 6s somewhere. You need to raise it. CYA is a mild acid, it shouldn't affect pH that much unless the pool is already suffering from low pH and low TA. Now you see why we ask for a full set of test results. Less back-and-forth; an instant answer is possible when given all the facts.




    You'll lose pretty much all your FC in a couple hours without any CYA, so if yours isn't fully dissolved, losing some is to be expected. It's a fresh fill, so there shouldn't be any algae in the water yet. Leave it for tomorrow.
    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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    Re: Opening pool chemistry

    Thank you. It was raining as I was trying to do my tests and I figured I would just wait since the CYA needed to be dissolved. I will run a fully tomorrow morning and update from there. I am new at this testing stuff so I am unsure I am doing it right. I appreciate your help!
    1500 gallon vynil liner inground pool
    Hayward super pump, Hayward sand filter
    Just bought the house, think the pool/liner were installed around 1995
    Taylor K-2600 test kit
    Filled with City water, Huntington, WV

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    Richard320's Avatar
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    Re: Opening pool chemistry

    Quote Originally Posted by ms097613 View Post
    Thank you. It was raining as I was trying to do my tests and I figured I would just wait since the CYA needed to be dissolved. I will run a fully tomorrow morning and update from there. I am new at this testing stuff so I am unsure I am doing it right. I appreciate your help!
    Here's a tip: grab a sample in some kind of plastic (no glass around the pool) container and carry it somewhere comfortable to do your testing. The CYA requires full sunlight to get a reading, but you can mix it indoors if need be. So kitchen counter, patio table, wherever. You don't have to do it squatting next to the pool in the rain.
    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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    Re: Opening pool chemistry

    ahhh, great tip! Ill try that this morning!
    1500 gallon vynil liner inground pool
    Hayward super pump, Hayward sand filter
    Just bought the house, think the pool/liner were installed around 1995
    Taylor K-2600 test kit
    Filled with City water, Huntington, WV

  6. Back To Top    #6

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    Re: Opening pool chemistry

    From what I see CYA is like 35. I dont think I should add more yet.
    CYA 30-40 (35 I think)
    pH 7.0
    FC 2ppm CC .5ppm
    TA 70ppm
    CH 110ppm
    1500 gallon vynil liner inground pool
    Hayward super pump, Hayward sand filter
    Just bought the house, think the pool/liner were installed around 1995
    Taylor K-2600 test kit
    Filled with City water, Huntington, WV

  7. Back To Top    #7
    Richard320's Avatar
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    Re: Opening pool chemistry

    Quote Originally Posted by ms097613 View Post
    From what I see CYA is like 35. I dont think I should add more yet.
    CYA 30-40 (35 I think)
    pH 7.0
    FC 2ppm CC .5ppm
    TA 70ppm
    CH 110ppm
    Raise the FC to about 5 and call it good for now. pH might need a little tweaking, but it's not critical yet. See if it rises naturally over the next day or two.
    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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    Re: Opening pool chemistry

    Ok, I just added the chlorine and Ill keep an eye on the pH. Thanks!
    1500 gallon vynil liner inground pool
    Hayward super pump, Hayward sand filter
    Just bought the house, think the pool/liner were installed around 1995
    Taylor K-2600 test kit
    Filled with City water, Huntington, WV

  9. Back To Top    #9

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    Re: Opening pool chemistry

    pH is still 7.0. Should I give it more time?

    The water is holding Chlorine really well (this was a problem before) so I am very excited about this.

    There is a lot of debris in the water because I hadnt got the cover on and of course my vacuum broke yesterday so thats no good. I wonder if I can connect a hose or 2 to one of the filter intakes and put a mesh bag over it to use while I am saving for a new vacuum.
    1500 gallon vynil liner inground pool
    Hayward super pump, Hayward sand filter
    Just bought the house, think the pool/liner were installed around 1995
    Taylor K-2600 test kit
    Filled with City water, Huntington, WV

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