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Thread: CYA questions

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    Join Date
    May 2013
    Location
    CT
    Posts
    17

    CYA questions

    Tried the CYA test today with a Leslie DPD kit the mix stayed clear the black dot never disappeared.Not sure if I'm going about this right.
    The water is really clear.
    FC 5
    PH 8.0
    TA 28
    Temp 55
    15600 AG
    Filter Cartridge
    Waterway HI-FLO 48 2 Speed
    HI-250 GPM,LOW-144 GPM
    BBB,Leslie DPD Tester

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    Richard320's Avatar
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    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: CYA questions

    Quote Originally Posted by rigger7
    Tried the CYA test today with a Leslie DPD kit the mix stayed clear the black dot never disappeared.Not sure if I'm going about this right.
    The water is really clear.
    FC 5
    PH 8.0
    TA 28
    Temp 55
    Assuming you mixed 50-50 with the reagent and pool water, it sounds like you have no CYA. Or it's below 20.

    Two things can cause that:
    1) You never added any, because there isn't any in tap water.
    2) You had that elusive bacteria convert it to ammonia over the winter.

    #2 seems unlikely, since it will use up any chlorine you add in a hurry.

    Is this a fresh fill?

    The solution is pretty simple. Use pool calculator to figure out how much stabilizer (CYA) you need to add, pour it in an orphaned sock or nylon (no holes!) and tie it off. Then tie the other end to something or even a full bleach jug and hang it in front of the return flow. Or tie it to a pool noodle and let it drift around suspended underneath.
    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
    May 2013
    Location
    CT
    Posts
    17

    Re: CYA questions

    Thank you! It is a fresh fill, we are new at this game (obviously). Okay, one more question.... when we shut our filter off and then turn it back on, the strainer basket pops up and the water does not feed properly into the filter causing a loss in pressure & air intake. Any suggestions?
    15600 AG
    Filter Cartridge
    Waterway HI-FLO 48 2 Speed
    HI-250 GPM,LOW-144 GPM
    BBB,Leslie DPD Tester

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

    Re: CYA questions

    Quote Originally Posted by rigger7
    Thank you! It is a fresh fill, we are new at this game (obviously). Okay, one more question.... when we shut our filter off and then turn it back on, the strainer basket pops up and the water does not feed properly into the filter causing a loss in pressure & air intake. Any suggestions?
    It sounds like you have air trapped in the filter. While the pump is running, it's compressed. Shut the pump off, it expands and pushes water backwards through the pipes.

    Hopefully there's an air bleed valve on top of your filter. Just open it while its running until all the air escapes and water starts squirting 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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    duraleigh's Avatar
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    Apr 2007
    Location
    Sebring, Florida
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    30,082

    Re: CYA questions

    1. Lower your pH to the mid 7's

    2. Calculate and dose enough CYA to get to 40 ppm....don't test for it for at least five days.

    3. You have a suction side air leak. Somewhere between the pump and the skimmer(s), air is being sucked into the system. Find that leak and your pump issues will be solved.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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