Did you still not get any response in your other post? The issue with me is I'm not sure how to reconcile your results with those from the other person in the (older) link I shared that you used. They're talking results of 10mg/L, which is supposedly good, and their "color key" seems to go up to 10 ppm.......while your color key seems to only go up to 3 ppm. I don't want to tell you bad information either with, yeah, it's good, or no, it's not. To me it definitely looks like there's something nitrite present in your SN, but really that's as far as I want to go. Have you done a blood test yet? Was it dark chocolate brown? Someone will chime in here. Just have to be a little more patient.