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Thread: High number OCLT testing

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    Join Date
    May 2012
    Allentown, PA

    High number OCLT testing

    Hello everyone,

    I have been working on getting my newly opened pool balanced all numbers are in range and water is finally crystal clear. My FC is at shock level of 27 due to CYA of 60. So the question is when I conduct my OCLT test I have clear water, less than 1 CC, and I am having trouble getting my FC to stay within 1ppm. It takes about 55 drops at night and about 51 in the morning. Is there any variation in test results with these high numbers? Or should I continue shocking?
    21,500 Gallon Vinyl liner pool Eastern Pennsylvania
    Hayward 2 HP pump 2" Pvc pipes Full Sun Pool
    Hayward sand filter, Compupool CPSC 48 SWG
    12mil solar cover and reel

  2. Back To Top    #2
    Smykowski's Avatar
    Join Date
    Sep 2011
    Gurnee, IL (North Suburban Chi-town)

    Re: High number OCLT testing

    Continue SLAMing. The criteria allows for up to 1 FC loss overnight to take into account your concern.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    frustratedpoolmom's Avatar
    Join Date
    May 2007
    SWSuburban Chicago, IL

    Re: High number OCLT testing

    No you should not see any variation. Keep at it
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    Perfectly Clear Pool Service, Find me on Facebook!

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

    Re: High number OCLT testing

    Look for secret algae hiding places, like inside ladders or steps, or behind the lght. And don't slack off on the brushing. Algae can form a slimy scab to protect itself from the chlorine. Brushing knocks it off and allows you to kill those last diehards that might be too small to see right now.
    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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