I like the Pure blend pro line but thats not technically 100% organic, if that's what you want. There really aren't any OMRI listed hydro nutes . that I know of
I prefer one step nutes. I use and like floranova bloom and grow by general hydroponics. No need to add any additives like cal-mag. The concentrated formula last much longer than PBP and others. When I used PBP bloom, I had no issues with growth or blooms but I had major gripe on just how much of the bloom you have to use and how quickly it goes. My god I couldn't finish one grow without needing a second gallon. If you are one that feeds a lot of plants this is even more important issue. I have no idea what the best nutes available and don't really care, but my requirements are simple. Great results, one part fertilizer cause its just easier, and just as important, how concentrated it is.