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Thread: Phenol red indicator question

  1. #1
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    Default Phenol red indicator question

    My test kit came with phenol red R-0004, for use with 2000 Series Comparator. I wanted to replace the reagant when that I was at Leslies. They had R-0014, for use with Residential Series Comparator.

    The salesclerk at Leslies said Phenol red is phenol red so it doesn't matter. I am thinking that they are NOT the same since they have different numbers. The R-0004 does seem to be a darker red, but I don't k now the significance of that.

    What do the experts here think?
    18x33x4 foot oval

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    Default Re: Phenol red indicator question

    It does matter. They are NOT interchangeable. You need the R-0004 for your 2000 Series Comparator. They are different concentrations because they are used in different water sample quantities.

    BTW -- Welcome to the forum!

  3. #3
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    Default Re: Phenol red indicator question

    One of them has a chlorine neutralizer in it, the other doesn't. I cannot remember offhand which is which.
    Oval 12.5K gal AGP; Hayward 19" sand filter; Pentair Dyn 1 HP 2sp pump on timer
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    Default Re: Phenol red indicator question

    The BOTH have chlorine neutralizers in them, The difference is the R-0004 is more concentrated since it is used in a 44ml water sample while the R-0014 is used in a 9 ml water sample. The larger water sample in the 2000 series comparators provides better precision for the acid and base demand tests.
    Retired pool store and commercial pool maintenance guy.

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    Default Re: Phenol red indicator question

    Thank you both for clarifying a misunderstanding I've held for some time.
    Oval 12.5K gal AGP; Hayward 19" sand filter; Pentair Dyn 1 HP 2sp pump on timer
    [URL="http://www.ellerbach.com/Pool/"]My Pool Pages[/URL]

  7. #7
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    Default Re: Phenol red indicator question

    Thank you very much. I will get the R-0004 that was in my kit.

    BTW, when I purchased my house in 1998 the previous owner was using bleach for the pool. I don't know what else, but I guess he was a little ahead of the curve for his time. I didn't find the light until recently....and the BBB method is working great!
    18x33x4 foot oval

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    Default Re: Phenol red indicator question

    Quote Originally Posted by Collector680 View Post
    I didn't find the light until recently....and the BBB method is working great!
    That's what we like to hear!

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