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Thread: 24hr drop

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    24hr drop

    I'm letting the chlorine level drop to target level for the pool after shock and overnite test.
    I tested yesterday and got fc 9.5 cc 0. Today I tested at same time 6 p.m. ,sun off of pool, and got reading of fc 9 cc 0. I was figuring I would see a loss of 1 to 3 ppm. Afternoon sun was partially blocked by clouds. With a cya of 70 would this be considered ok for a 24hr drop?
    Would I be ok in letting the fc,cc drop to 5 since the chart recommends 4 to 8 ? At 8ppm the taylor basic kit will not be useable so I am using the chlorine drop test.
    Wife is out of school for the summer (teacher) and called me at work today. First question I had to ask her was "how's the pool doing today",,smiley goes here!
    thanks for all the great help from this site....
    21000 Gallons I/G,,Vinyl,, 1.5 H.P. Hayward Pump,, Hayward Sand Filter S244T.. Liquidator.

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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: 24hr drop

    Losing only 6% of your FC level in 24 hours is surprising, but not impossible. Since it is a good thing, I wouldn't worry about it.

    Sure, let the FC level continue to drop till it gets to 5.
    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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    Re: 24hr drop

    Quote Originally Posted by JasonLion
    Losing only 6% of your FC level in 24 hours is surprising, but not impossible. Since it is a good thing, I wouldn't worry about it.

    Sure, let the FC level continue to drop till it gets to 5.
    thanks,, i'll test it daily and let it drop to 5
    21000 Gallons I/G,,Vinyl,, 1.5 H.P. Hayward Pump,, Hayward Sand Filter S244T.. Liquidator.

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