I know this thread is a bit old. Just thought I would add my two cents.
Sea Green is absolutely amazing! Most reps from other companies, organic or chem, will tell you that they use it in everything.
First off, Vangs, 2-3 ml/gal is total overkill. It won't burn your plants or anything, but all you really need is 1ml/gal. Its actually a very economical product when you realize just how concentrated it is. If you have that large an operation and run it at the 1ml/gal dilution ratio, it doesn't make sense NOT to use it.
Right off the bat, the unit cost is incredibly low (1 Gal = 3785 ml which is 3785 gal treated or about 8 cents per unit dose.) In addition, the millions of species of soil microbes present in
Sea Green will consume whatever fertilizer you're using in it's salt form and release it in a form that the plant is more easily able to absorb, which means less goes a longer way.
I've been using this stuff for about two years now, and I wouldn't go without it ever again.