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Thread: Chlorine drop test question

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    FirstVallartaPool's Avatar
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    Apr 2016
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    Puerto Vallarta mexico
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    Chlorine drop test question

    I tested 10.5 [21 drops] FC but when I go to do the CC test I'm a little confused. When the colour goes clear from pink then that is the total number of drops to Record? Because if I let it sit for a minute or so it eventually turns back to pink from clear. I'm at 15 drops now and still eventually returning to pink?
    Thanks
    Pool 3800 gaĺlon glass tiled concrete approximately 10 years old/ Puerto Vallarta
    Hayward sand filter S166t.
    Pool Pump Silver10/1115 1hp
    Heat siphon Sx3.25hp
    Hard Municipal Water tf-100 test kit

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    jcowart's Avatar
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    Jun 2012
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    Labelle, TX
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    Re: Chlorine drop test question

    Yes it will turn pink if you just let it sit. When your doing the fc test. Count the drops till clear. Add 5 drops of r-0003. If you get pink again. Count till clear. If you dont get pink the test is over. The first is FC, the second test is CC.
    17500 gallon Doughboy AGP, Hayward DE filter, waiting for the 1.5hp DB pump to go out.
    Learn to take the advice here and be trouble free or use the pool store's advice. "You can't do both and get very far"

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    Divin Dave's Avatar
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    Oct 2013
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    Longview, Texas
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    Re: Chlorine drop test question

    Yup.
    If you let the solution sit too long, it will turn pink again because some of the other chemicals in the water start to oxidize.

    to test for CC - Do not let the solution sit for more than maybe 10 seconds after it goes clear, then add the R0003.
    If its pink after adding R0003, then add R0871 by 1 drop at a time until its clear again.

    When Im testing, I take the caps off of both the R003 and the R0871 and have them ready to go without any waiting around.
    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.
    www.tftestkits.net Experience- it's what's learned just after you needed it most !!

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    FirstVallartaPool's Avatar
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    Apr 2016
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    Puerto Vallarta mexico
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    109

    Re: Chlorine drop test question

    Ok thanks guys for the quick response help!
    After draining half the pool due to high cya here are the new results. Any input most welcomed. Water is pretty good but not crystal.
    Ph 7.2
    Ch 175
    Fc 9.5
    CC .5
    Tc 10
    Cya 38-40 yay
    Pool 3800 gaĺlon glass tiled concrete approximately 10 years old/ Puerto Vallarta
    Hayward sand filter S166t.
    Pool Pump Silver10/1115 1hp
    Heat siphon Sx3.25hp
    Hard Municipal Water tf-100 test kit

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