Both Hydro-Organics(EJ) and Humboldt Nutrients are organic and can be used in hydro. But If you are going to use Humboldt Nutrients Natural or Earth Juice Original, you will need a biofilter and benificial organisms.
However, I'd recommend the new Hydro-Organics line "Sugar Peak". It's organic enough for me. And it's a simple one part at a time hydro nutrient. Been working out great so far. Loving it. Next, I've been meaning to try "Sweet and Heavy".