I'm with you. What would be best for veg ? and what for flowering ? This would have to be answered by some one who kept very good records much like a ships log. And a botonist, and a conisuire to be able to judge how good. Or a lab to test. The science would be mind boogleing , and so simple at the same time. I suppose it would have to be done for each strain as well. Some thing to think about. Up till 3 weeks into 12/12 my PH has been on the high side. I think I will keep it on the low side for the rest of the 5 weeks and see what happens. That's what playing is all about.