I have used this maybe three times and, in light of my current tank water issue I may be a little overly cautious. Here is a shot of the flourish in the cap... I was certain it was greener than that. I know that the label on the bottle is mostly green and I am used to seeing fertilizer products for ground plants that are green even though I get that a brown or other colour is probably the native colour of a fert. I would rather not be putting colour additives into the water but I also don't want to put bad fertilizer in either.
I shook it before pouring too.
I likely wouldn't have used it anyway, seems silly to add anything unnecessary before getting the nitrites settled down.