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Thread: Daily Tests

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    Marci M's Avatar
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    Daily Tests

    I realize that this is a total newbie question, but I'm really confused.

    If my daily Chlorine OT tests only for TC, how do I know how much bleach to add if the amount is based on FC? Do I need to the DPD test every day to figure out how much FC I have?
    13 K gallons, in ground, rectangle, 14 x 30 Vinyl, single main drain, Sand filter, Hayward Tablet Chlorinator, Pentair Pump

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    Mod Squad YippeeSkippy's Avatar
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    Re: Daily Tests

    The OTO test kit is handy for a quick "look-see" to confirm that yes, there is chlorine there! (or conversely no, there isn't any chlorine in there!). Since it only goes up to 5ppm it isn't terribly useful to me.

    I just run a quick pH test and a DPD drop test (with CC test) for my daily or every other day tests.

    As to how much bleach to add I know that whatever my FC is I can add 17 ounces of bleach and it will raise my FC by 1ppm.

    For your sized pool 19 ounces of 8.25 % should raise it 1ppm. Makes for a fast way to bump up the FC by knowing that.
    Maddie :) 12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
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    Mod Squad woodyp's Avatar
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    Re: Daily Tests

    If you have the fas-dpd test, use it. Accuracy counts!
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    Marci M's Avatar
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    Re: Daily Tests

    Okay, that's what I thought, but I just wanted to be sure I wasn't misunderstanding my TF-100 instructions.

    Thank you.
    13 K gallons, in ground, rectangle, 14 x 30 Vinyl, single main drain, Sand filter, Hayward Tablet Chlorinator, Pentair Pump

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