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>The instructions for my LaMotte Nitrate test end thusly:
>"Match colour to a colour standard. Records as ppm Nitrate as Nitrate
>Nitrogen (NO3-N). To convert to ppm Nitrate (NO3), multiply by 4.4."
>I'm guessing that the second, higher number is the one we use when
>talking about nitrate levels in the tank. What is the
The non-multiplied number is the nitrogen ion concentration.
The multiplied number is the NO3- ion concentration.
See www.actwin.com/fish/mirror/Annex/nitrate-tests.txt for a detailed
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