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Thread: CYA Active

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    CYA Active

    Is CYA active once it has dissolved in sock? or am I just wasting more bleach? Would to 3 gallons of 8% a day to just stay at about 10 ppm for a 15000 gallon seem like a lot? it falls to like 3 ppm in about 3-4 hours.
    1600 gal AG Oval
    18x34
    1 1/2 HP hay 4 lb de 38 GPM
    Roover vac.
    pool owner 19 years

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    Re: CYA Active

    The pool is definitely consuming too much chlorine, but we need full test results to answer what is happening and how you are getting the test results.
    FC
    CC
    pH
    TA
    CYA
    CH

    Is the water crystal clear?
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
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    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

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    Mod Squad jblizzle's Avatar
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    Re: CYA Active

    It may not be fully active for a week after dissolved from the sock. But we recommend assuming it is active.

    The loss depends on the CYA level, the sun exposure, organics in the water, and how high ppm you are maintaining. The CYA kind of sets the % that is lost to the sun.

    Say at CYA of 30ppm, you lose ~50% each day. If you started at 4ppm, you would lose 2ppm. If you started at 10ppm, you would lose 5ppm each day.

    If you had 0ppm of CYA, you would lose 50% of the [s:1qc0u3oh]CYA[/s:1qc0u3oh] FC to the sun every HOUR.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: CYA Active

    Im testing with test strips right now because I was unaware of the better kits, but it is what I have to use right now. PH was at 7.8 TA was at 80 CYA would not register. I was unable to maintain any fc until I dissolved 6lbs of stabilizer thru sock on discharge yesterday. put bleach in last night checked this morning and fc was about at 3 added gallon 8% about 3-4 hours later fc at 4 added another gallon 3-4 hrs later fc about 3 added gallon about hour ago now fc at high 10(checked with test strip) for a hour. the pool was in real bad shape had leaves allege and a lot of tad poles from the frogs. pool is now milky blue able to see about 2 feet down. it sits in full sun right now about 85 degs., this week.
    1600 gal AG Oval
    18x34
    1 1/2 HP hay 4 lb de 38 GPM
    Roover vac.
    pool owner 19 years

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    Re: CYA Active

    sorry pool is 15000 gallons
    1600 gal AG Oval
    18x34
    1 1/2 HP hay 4 lb de 38 GPM
    Roover vac.
    pool owner 19 years

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    Re: CYA Active

    You need to go through the shock process, you can read all about it in pool school.......Mime
    18x52 intex ultra frame pool 6981 gallons, 1 HP LL pump with 19 in sand filter,BBB method,borax 50ppm
    leslies DPD test kit + fas-dpd chlorine test kit + borates test strips
    thru wall skimmer,hard plumbed with 2 returns 1 1/2 sch 40 pvc
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    Mod Squad jblizzle's Avatar
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    Re: CYA Active

    Well you were much more aggressive with the CYA addition than we would have recommended. The 6 lbs should add around 48ppm ... we would have recommended performing the shock process at around 30ppm. Plus, apparently you are assuming you had 0ppm of CYA, which is not likely true unless this is a new fill ... and the strips are often very inaccurate.

    I agree with the above. You need to follow the Shocking Your Pool PROCESS and to do that correctly, you need to order one of the Recommended Test Kits ... the investment will pay itself off pretty quickly once you KNOW the condition of your water.

    I certainly hope your CYA is not much higher than 50ppm, or you will likely need to replace some water to lower it before the shock process.

    Also, Please add your pool details and location as described HERE to your signature as it will help us help you.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    linen's Avatar
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    Re: CYA Active

    Welcome to tfp, jim001

    Definitely follow jbliz's advice and get an appropriate test kit. It will save you in the long run. Many of us have the tf-100 which is the best value.

    Once you have the appropriate tool, then you can figure out what is going on with the pool.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: CYA Active

    went aggressive with cya because i will be vacuuming to waste and need to flush the de filter as it is clogging up often.I would proceed with shock but first i need the pool to hold the chlorine to get there.
    1600 gal AG Oval
    18x34
    1 1/2 HP hay 4 lb de 38 GPM
    Roover vac.
    pool owner 19 years

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    Re: CYA Active

    I would proceed with shock but first i need the pool to hold the chlorine to get there.
    A pool does not "hold" chlorine. Chlorine is consumed constantly by two things. Sunlight and the contaminants in your pool.

    You have excess contaminants (organics) and you need to shock the pool to clear them out.

    read "The ABC's of Pool Water Chemistry" up in Pool School
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: CYA Active

    well I think from reading here and all the help that my problems were two fold Sun (lack of cya had to add a lot of water when opening) and the darn decomposing tad poles hope i have them all vacuumed out cant see the bottom yet. Test kit will be ordered next pay day,(unless i have to buy another 55 gal barrel of bleach).
    1600 gal AG Oval
    18x34
    1 1/2 HP hay 4 lb de 38 GPM
    Roover vac.
    pool owner 19 years

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    Patrick_B's Avatar
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    Re: CYA Active

    Quote Originally Posted by jim001
    Is CYA active once it has dissolved in sock? or am I just wasting more bleach? Would to 3 gallons of 8% a day to just stay at about 10 ppm for a 15000 gallon seem like a lot? it falls to like 3 ppm in about 3-4 hours.
    Welcome to TFP Jim. Good advice here, and hang tough for a while. It will come around with good chemistry, testing and some elbow grease.
    TFP Moderator
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    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

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