Its not that no one likes the question or that it is a tabu subject, its just wrong for anyone to answer it the way you have asked it. I looked at your pictures, I don't see what you are talking about, it really doesn't matter, IF IN DOUBT FLUSH IT OUT, first. Nutrient mixtures are made to work together, if you think there is a nitrogen deficiency, you bought bad nutes, or you need to change your tanks. When you flush use 1/4 strength nutes, run it for a day and then refill your tank with clean water and nutes.
You will get answers if you keep it all in one place, and jumping on a newbie won't help you, you have a lot more experience then he has, did you look at the picture he put up?? VV