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Thread: Did CC guideline get lowered to < 0.5 instead of < 1.0?

  1. Back To Top    #1

    Join Date
    Sep 2010
    Southern California

    Did CC guideline get lowered to < 0.5 instead of < 1.0?

    I see from the ABCs that if my CC is too high, it's time to SLAM. However, everyone here has usually told me if it's lower than 1.0, it's fine, but now I see it should be lower than 0.05. Did the guideline get lowered? I've sometimes had 1.0 and not worried about it. Today I have 1.5, so it's SLAM time
    Southern California • 30K gal • Pebble • Pentair WhisperFlo 1HP 2 speed • Hayward DE6020 filter
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    Dolphin Premier Cleaner • Taylor K-2006 test kit

  2. Back To Top    #2
    Mod Squad Texas Splash's Avatar
    Join Date
    Jun 2014
    South-Central Texas, Marion/San Antonio

    Re: Did CC guideline get lowered to < 0.5 instead of < 1.0?

    The <= .5 CC still applies, and is just one of the 3 criteria used to evaluate your water condition. An elevated CC simply means that your free chlorine is in the process of killing some organics, and those organics are in a "trash" state if you will, awaiting oxidation. When it goes over .5, we tends to look closely at all the readings and conditions of the water before jumping to conclusions. With your CC reading, you should also evaluate the clarity of your water, and if you still have a concern about algae, do an OLCT to confirm if you need to SLAM.
    When performing the OLCT, remember that it must be done when the sun has dropped – no sunlight on the pool. About 8 hours total is recommended. If you have an SWG, turn it off. Also, your FC level should be elevated more than normal. Starting (bedtime) FC could be close to your SLAM level, but no lower than 10. Anything less and you may not receive an accurate portrayal of FC loss (by percentage), even if it’s only 1 ppm.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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  3. Back To Top    #3

    Join Date
    Jul 2015
    Western NC

    Re: Did CC guideline get lowered to < 0.5 instead of < 1.0?

    Quote Originally Posted by Texas Splash View Post
    do an OLCT to confirm if you need to SLAM.
    Shirley, you meant an OCLT.
    23,000 gallons IG gunite, pebble (I think)
    Hayward SP2610X15 1.5 HP Pump, Hayward sand filter
    Mineral Springs SWCG (it's actually Hayward/Goldline), Hayward Goldline T-CELL-15
    Polaris pool cleaner (with booster pump)
    TF-100, SpeedStir, K-1766 Taylor Salt Test, Lamotte Borate test strips

  4. Back To Top    #4
    Divin Dave's Avatar
    Join Date
    Oct 2013
    Longview, Texas

    Re: Did CC guideline get lowered to < 0.5 instead of < 1.0?

    Probably a bit of mis interpretation about this question.
    The CC has always been .5 or less (1 drop to go clear).
    The OCLT is 1ppm loss overnight or less
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge. Experience- it's what's learned just after you needed it most !!

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