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Thread: Holding high CL

  1. Back To Top    #1

    Join Date
    Jul 2007
    Katy, TX

    Holding high CL

    I have been adding CYA to pool over past couple of weeks. My FC was 10.5 last weds. I dropped my SWG down from 80% to 60%. I retested last night (had been out of town) and it is still at 10.5. My ph 7.4 and alk 90. I dropped my generator down to 30% for today (my pool sits in full sunlight). What else should I do? SHould I keep it running at 30% or go higher/lower and test daily??? Thanks.

    24,000 IG with spa and 4 ton waterfall. Equipment: Pentair 520 Clean & Clear, Pentair VS+SVRS Intelliflo, Pentair Whisperflo 2 HP, Polairis Cleaner, Intellibrites, Pentair Rainbow 320 in-line Chlorinator, Pentair Easy touch 8 wireless and spa side remote.

  2. Back To Top    #2
    tagprod's Avatar
    Join Date
    Jul 2007
    Tomball, Texas
    you're in the H-Town area and it's been brutally hot. I think you could leave the generator at 30 for a couple of days and it should start coming down.
    20K IG Gunite w/ raised 7ft spillover spa. 1.5 HP Hayward Northstar pump 425 sq ft Hayward cartridge filter, Colorlogic lights AquaRite SWG AquaLogic PS-8 control
    1hp pump for sheer descent

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD
    The best thing to do is to test every day towards evening, when the chlorine level will tend to be lowest, and adjust the percentage as needed. After a week or two you should zero in on the desired setting and be able to reduce how frequently you test. If you are way off, making extra large changes in the percentage can speed up the process. As long as you are testing daily any over corrections can be fixed the next day.

    If your unit is not temperature compensated, AutoPilot units are most others are not, you will need to raise the percentage when it gets hot and lower it when it gets colder. With a little experience you can learn to anticipate these changes by having an idea of where the percentage should be in different seasons.
    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

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