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Thread: new member from tennessee with cya at 100!

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    Join Date
    Jul 2015
    nashville, Tn

    new member from tennessee with cya at 100!

    Hi, I just had a vinyl above ground pool installed in April 2015. I stumbled onto the BBB method on google. I was intrigued by being able to maintain my pool with things I could buy at any store. I started out by buying the taylor k-2006 test kit on amazon. Immediately reading the booklet I got a terrible headache from all the terminology and calculations and wanted to give up. However, I forged ahead and am starting to have some understanding. My pool water is and has been crystal clear. The only problem I am having is extreme eye irritation. I have been using trichlor tabs and shock. I was shocked to find that my pools cya level is at least 100! I checked my water yesterday and my fc=13.6, cc=0, ph=7.2, ta= 60. thanks in advance for any help or advice.
    pool installed april 2015. above ground 15 x 30 oval , 52" deep, 15,000 gallon, with vinyl liner, sand filter. taylor k- 2006 fas-dpd test kit,

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: new member from tennessee with cya at 100!


    Astronomical CYA is perhaps the most common problem here. It usually just manifests itself as cloudy or green water, but you're an exception. Be aware that your CYA may in fact be much higher than 100. The graduations get awfully close down near the bottom of the tube. Try retesting it using the dilution method in Extended Test Kit Directions

    Also note that you're near the bottom of the pH scale. You could be lower than 7.2, which will irritate eyes and skin. I'd guess you are much lower since high FC tends to make pH read falsely high. Since you have the K-2006, you have the base demand test. Try it and see how many drops it takes to get to 7.5 pH. You can use that to calculate what you need to add to raise pH and compare it to poolmath and determine if you're lower than you think. Just post here and someone will be along to help. Don't bother treating it yet -- you just want to know if that's the cause of irritation. There's no point fixing pH if you're going to replace the water. And you can't really, not without having an accurate pH reading to start.

    Just so you know... I see a partial drain in your near future to reduce CYA. How much depends on what you read when you repeat the test using the dilution method. Right now, your pH reading is suspect due to the high FC. And you'll need to maintain the high FC unless you lower the CYA. You're stuck.

    Now that I've got you like just know that you need to get an accurate CYA reading and replace some water until you get to at most 60 CYA. Lower would be better. Then you retest everything after letting the new water mix with the old and fine-tune it. And no more pucks! They are very acidic and cause CYA buildup to boot!

    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.
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    YippeeSkippy's Avatar
    Join Date
    Jan 2012
    'burbs of Augusta, Georgia

    Re: new member from tennessee with cya at 100!

    Do you have kids in the pool...perhaps peeing in it now and then? The CDC just came out saying *that* is the cause of eye irritation in pools. LOL <shrug>

    So your CYA might actually be well over 100 , so mix equal parts of tap water with pool water, then use this to perform another CYA test. Double the results. It might show you to be well over 100. Which in itself is a terrible shame for such a new pool- but not impossible to fix. Can you drain about 1/2 your pool and refill with fresh water? Then retest the CYA . You want to get down to 40-50ish max and then start using plain old household bleach instead of pucks to chlorinate the pool.
    12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub. Our pool build--> Our Pool Solved Our Sloping Yard Skippy's Cheap Pool Cooler -->Skippy's New Fountain
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    BoDarville's Avatar
    Join Date
    Jun 2012
    DFW, Texas

    Re: new member from tennessee with cya at 100!

    You've been given good advice so far on the CYA, so I will simply welcome you to TFP!
    Gold Supporter, TFP Lifetime Supporter, 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
    A good test kit is an investment, not an expense.

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    Casey's Avatar
    Join Date
    Apr 2007
    SW PA

    Re: new member from tennessee with cya at 100!

    Welcome to TFP!
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

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