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Thread: Can't get CC to drop

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    Can't get CC to drop

    Pool is crystal clear (even after being gone a week and having someone only add 2 cups of chlorine a day and only running the filter without the waterfall setting during the day).

    We aren't losing FC at night...during the day we have about a 37% drop (from 23 to 14.5 over 11 hours). CC went from 1 to 2.

    We have cleaned behind the lights and in the waterfall. Not sure how to clean the cover...we don't have a clean place big enough to lay it out.

    Could the rock waterfall be affecting this?
    30k in-ground pool with pebble surface, cartridge filter, solar panel with solar cover

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    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    Re: Can't get CC to drop

    Raise the FC level significantly and see if the CC goes away in the next 24 hours. If it doesn't you will need to SLAM the pool.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Can't get CC to drop

    I was slamming for over a week before going on vacation. Already resumed slamming on Sunday. How much should I raise the chlorine? I have been trying to keep it at the slam level of 22 (per my cya of 55).
    30k in-ground pool with pebble surface, cartridge filter, solar panel with solar cover

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    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
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    12,082

    Re: Can't get CC to drop

    I'd take off your solar cover for at least part of a day or a full day as the UV in sunlight should get rid of much of the CC (depending on what the CC is composed of) by breaking down chlorine into powerful oxidizers (hydroxyl radicals) that oxidize many chemicals including CC.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    Re: Can't get CC to drop

    Quote Originally Posted by chem geek View Post
    I'd take off your solar cover for at least part of a day or a full day as the UV in sunlight should get rid of much of the CC (depending on what the CC is composed of) by breaking down chlorine into powerful oxidizers (hydroxyl radicals) that oxidize many chemicals including CC.
    I will try that today. Thank you!
    30k in-ground pool with pebble surface, cartridge filter, solar panel with solar cover

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