nitrate reducer

About a month ago, I discovered at MACNA that I was misreading my nitrate test kit for a very long time. I use Salifert kits. Just in case you use the same kit, let me clarify one important step:

After the test is complete (including the 3 minute wait period), if the solution matches 10 or less on the color chart, hold the beaker up and view the color through the side with the color chart behind the beaker. Whatever that result is, divide by 10. So if it looks like 50ppm, it would be 5ppm.