ROYAL NATURE - Nitrate Professional Test - 100 measurements

With Royal Nature 's Nitrate Test you have a two step process using powder and liquid to measure Nitrate (NO3) in the following range of values 1, 5, 10, 25 and 50 PPM.
The Nitrate concentration should not exceed 20 PPM in salt water and should preferably be less than 10 PPM in a reef aquarium.

The Royal Nature Nitrate Test can be used in both fresh and salt water. Nitrates can be determined using a thin, tinted color tape that reacts to nitrate concentrations between 0 and 50 PPM.
The Royal Nature Nitrate Test Kit is designed to be easy to use and read. In addition, this kit will allow you to perform 100 Nitrate tests.

Royal Nature has spent time making this kit to be accessible but not only to make it easier to read and more accurate. The biggest complaint usually made with titration test kits is its reading mode which makes the process uncertain. So the color variation is important for many factors, like the ambient light, the way of doing the sampling or the individual visual perception of the colors.
Royal Nature wanted to take its time, to draw inspiration from scientific studies to make a measurement scale with colors adapted to general visual perception.