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Hanna ULR Phosphorus meter

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  • Hanna ULR Phosphorus meter

    ok, so iIhave the hanna ulr phosphorus checker, I'm having an issue saying that it is over range. (flashing 200) I seriously doubt my po4 is high enough to cause it to be over range. checked nitrates and it doesn't even change color. No corals are showing any signs of stress. Is there any way of testing to make sure this thing is working correctly? the reagent expires 06/19 lot H062. I checked it DEC 11, 21, and today I tested multiple times with the same result. I even tried using freshly made salt with the same issue
    -Travis-

  • #2
    Yeah, it sounds like it's jacked. Have you tried just testing straight RO/DI water?

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    • #3
      I'm starting to think it's a bad reagent if I don't use any it just reads 0
      -Travis-

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      • #4
        is it expired. Try doing 50% tank water and 50% roDI

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        • #5
          it doesnt expire until 06/19
          -Travis-

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