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Thread: Newbie to BBB has pesky CYA Question

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    Join Date
    Jun 2010
    Location
    NE Ohio
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    52

    Newbie to BBB has pesky CYA Question

    We are very happy with BBB and the appearance of our pool. We were able to leave for the weekend and even with no additional chlorine beyond what I raised on Friday afternoon, we came home to a sparkling clean pristine pool. We could not be happier. My question is that the pool will not hold chlorine.

    Now we have been gone since Friday afternoon so 0 chlorine isn't a huge shock to me - but even before I left we were losing most of it overnight. (ETA Losing it from morning to night).

    Today's numbers
    FC 0
    TC 0
    pH 7.2
    Alk 90
    CYA Unknown at this time - *likely very low
    Temp 71 degrees (welcome to Autumn in July in Ohio. It was 68 this weekend with rain)

    The water is gorgeous and all staining is gone (knock wood!) My only concern at this point is CYA. I am waiting for CYA results (pending test - I have the wrong one) but on 7/6 the number was 30 and we have had a significant water change, rainfall and no additional CYA. Pool is uncovered 24/7 with full sun the majority of the day.

    All this to say that I'm pending a new test but I am preparing for our CYA is to be at almost nonexistent levels.

    pH, Acid and appearance of water is fantastic. Am I wrong to hope that if I get CYA under control it will hold chlorine for more than a day? I'm trying to let the pool lead us. One bonus of BBB is that previously our pH always ran high. We blamed well water and the pool story said it was just a high pH pool. Added Borax last week and pH has been spot on since.
    24' round/52" deep Leisure Bay AG est. 13.5k gallons
    Hayward TS180 Sand Filter

  2. Back To Top    #2
    Richard320's Avatar
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    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Newbie to BBB has pesky CYA Question

    Losing all the FC overnight indicates something is still alive in the pool.
    Losing all the FC during the day could very well be low CYA.

    How to tell: testing. The overnight loss test using the FAS-DPD test can rule out the one. The CYA test will rule out the other. That's why the proper test kit is so important.
    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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    Join Date
    Jun 2010
    Location
    NE Ohio
    Posts
    52

    Re: Newbie to BBB has pesky CYA Question

    Thanks! I'm waiting for my new(est) test. Until then we have to muddle along with what we have.

    It could be wishful thinking but the water is almost too clear - and has been left alone for too long - without growing so much as a smidge for me to think anything is in there. The PS had us on 0 chlorine for weeks - in a heat wave. I have to think if anything was going to grow it would have. We left it alone all weekend and the water looked better when we came back. We are starting to think we should just be like "shhh... don't talk to the pool, it's doing something."

    According to my rabid testing (newbie thrill) we lose chlorine from am to pm and I think it's just burning off. I can't wait to get the proper numbers. It was a little chilly sticking my kit into the water this am (57 degrees) but I like the swirling and the readings.

    The good news is I'm so into the tests right now that I will run out of the chems on this one shortly. I think I'm testing daily things that veterans test weekly.
    24' round/52" deep Leisure Bay AG est. 13.5k gallons
    Hayward TS180 Sand Filter

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    Mod Squad Bama Rambler's Avatar
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    Jun 2009
    Location
    SouthWest Alabama
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    22,347

    Re: Newbie to BBB has pesky CYA Question

    That happens to all of us. You'll get comfortabel with the pool and the tests soon and you'll stop testing things like TA, CH and CYA daily. It's a good thing to test a lot in the beginning as it allows you to get very comfortable with the tests and the pools personality.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    duraleigh's Avatar
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    Apr 2007
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    Sebring, Florida
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    30,083

    Re: Newbie to BBB has pesky CYA Question

    Your CYA test will remove the guesswork, I you will become a rabid Pool Nerd next.

    The last step comes quickly thereafter when the "whole picture" of managing your pool (through testing) becomes almost second nature to you.....then you will likely become Pool Snob.....The highest rank attainable.

    Yes, you can expect your FC to hold MUCH better when your CYA is adequate.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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