Rocketman is correct, getting the color bars from someone online will not give you accurate colors. Too many variables; your monitor, your printer, the scanner, etc. They all display & render color differently. Best to get a card sent from Hagen. (believe me, I work in the printing industry & deal with color every day)
I have a Hagen Nitrate test kit, you do not put 5 drops of each solution in. The instructions are as follows:
Take a 5ml sample of the water to be tested.
Add 5 drops of Reagent #1 and 5 drops of Reagent #2. Shake well.
Shake Reagent bottle #3 vigorously for 5 seconds. Add 3 drops of Reagent #3. Shake again.
Wait 5 minutes for color to develop. Shake again and compare to color chart.
Hope this helps.
Vagabond