You should be good with 1ml, but you might consider just going to floralicious+ instead. I have recently added that to my mix and so far so good. I am liking it. its a 2-0.8-.02 But at only 1 ml a gallon, i can just adjust my numbers a little with my 3 part and make it right.
I have a stain that i am learning is very sensitive to nitrogen. This worksheet helped me out a TON!!! Check it out. if you scroll about half way down, you can do basic calculations there, but there is a download link and you can download an excel file and add you own nutes and stuff. i LOVE it!!