Is your water orange instead of yellow before adding solution #2?Yes I believe it is?View attachment 850528
No, I try to never do that by opening and closing bottles individually.Did you ever mix the lids up? That is something I try and avoid.
That’s what I decided to do yesterday because after adding solution #2 it just tested 0 ppm. My tap water has nitrates in it so I shouldn’t test 0 in my aquarium ( no live plants). All the other solutions are working fine thankfully.If it looks like 5 right of the bottle, toss it and buy a new one. Also, if you have nitrites present your nitrate test will not be acurate. Once nitrites test at zero you can trust the nitrate test.