How to read Hach Low range Nitrate Nitrogen test kit
 

This kit measures Nitrate (N) from 0 to 1 ppm (or from 0 to 10 ppm if
you dilute the sample to a power of ten with demineralized water).

One thing that has me confused is:

"Read the mg/L nitrate nitrogen (N) through the scale window. To
obtain the results as mg/L nitrate (NO3) multiply the reading on the
scale by 4.4."

So, if I want to target the nitrate in my plant tank to 5 ppm or mg/L,
to I use the measurement of Nitrate (N) or Nitrate (NO3) (4.4 times
the other figure)?



Thanks!!



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