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Thread: Differences in pH Tests...

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    dattia's Avatar
    Join Date
    Jun 2008
    West Chester, PA

    Differences in pH Tests...

    This week I ran out of the yellow bottle of reagent for my daily FC/pH test kit. I know these are commonly found, so I picked a new kit up locally (AquaChem). When I tested with the new kit, I was showing a raised pH (bright pink), so I added a little pH down. I have seen no change in my readings with this kit for 3 days now where it concerns ph... and up to this point, I hadn't really had any fluctuation in my pH.

    I got out the old kit which still has some reagent in the red bottle. I used that to take another reading and it says that the pH is 7.5, which is pretty much where it's been all season.

    I'm not sure what the difference in these two tests can be. Any thoughts?
    27' round AG
    Hayward Matrix 1 1/2 HP Pump
    Hayward S210T Sand Filter

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    coffeegoddss's Avatar
    Join Date
    May 2012
    Minooka, IL

    Re: Differences in pH Tests...

    Reagents have shelf lives, don't they? Maybe one is too old...?
    AG, 10,400 gallons, filter cartridge, 2HP pump
    Coffeegoddss...bonafide thread killer!
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  3. Back To Top    #3
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: Differences in pH Tests...

    What's your FC? Some pH tests are more sensitive to high FC than others and if you're runnign high FC it may be fooling the new test. You could add a drop or two of acid to a gallon of water and see if the new kit will see a difference.
    Dave J. TFP Moderator
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