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Thread: Why CYA is lost

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    Why CYA is lost

    I can't seem to maintain my stabilizer. I finally got most of the other chemistry in line, but have been running with a high pH. I know the hot Az sun is part of the reason, but going from 80 to 20 or below, adding > a galon of liquid stabilizer, then repeating the process the next week, dosen't sound right. do I just need solid cya once my levels are right? how much of this stuff should I expect to go through this summer?

    (I'm sure there is a compete write up on this, but I could find it in the search.)
    16 K gal pool & spa, concrete (pebblefina), Jandy aquapure SWG, Jandy pda-PS3, PV3 infloor cleaning. built 2011, scottsdale,az

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    tjwaggoner's Avatar
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    Re: Why CYA is lost

    I was always under the assumption that CYA is really only lost due to backwashing and splash out.
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

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    tjwaggoner's Avatar
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    Re: Why CYA is lost

    How are you testing your CYA? Are you using a TF kit or is a pool store doing it?
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

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    Re: Why CYA is lost

    TF kit
    16 K gal pool & spa, concrete (pebblefina), Jandy aquapure SWG, Jandy pda-PS3, PV3 infloor cleaning. built 2011, scottsdale,az

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    tjwaggoner's Avatar
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    Re: Why CYA is lost

    Are you having to add a lot of water to the pool? Maybe have a leak?
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

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    Join Date
    Mar 2011
    Location
    Sunny Central Florida
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    91

    Re: Why CYA is lost

    I don't know, I lose a lot too. When I started BBB, my CYA was only 90, and I had been using exclusively tabs for years. I've been BBing for a little over a year now, after the first 6/8 months it got down to 30, and now I put 8-10 tabs in the thing every other month to get it from 20ish to 30/40.
    IG Plaster 20,000gal, attached spa w/ spillover, hayward C12002 cart filter, 1 1/2hp pump w/ polaris 360
    6/16/12 - PH 7.6, FC 6, CC 0, CYA 30, TA 80, Calcium 310

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    JasonLion's Avatar
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    Re: Why CYA is lost

    The most common causes of CYA going down are splash out, backwashing, and leaks. It is also fairly common for CYA to disappear over the winter.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  8. Back To Top    #8

    Re: Why CYA is lost

    but if my salt level is stable, shouldn't that rule out water loss?
    16 K gal pool & spa, concrete (pebblefina), Jandy aquapure SWG, Jandy pda-PS3, PV3 infloor cleaning. built 2011, scottsdale,az

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    tjwaggoner's Avatar
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    Ashland KY
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    Re: Why CYA is lost

    I would think so. Im guessing there is a problem with the test in some way if everything else is staying stable
    10,000gal fiberglass kidney
    3/4 hp whisperflo
    Sand dollar SD80
    IC40 SWCG
    (2) PAL2000 multi colored LED lights
    all 2" plumbing
    no water features/no spa
    TF Testkit

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