i got a bottle of superthrive for free the other week and ive been testing it out. im still observing the effects but one thing i can tell you now is that it turns all of my equipment nasty. i use the tiniest drop possible per gallon and it still turns my mixing containers and tubes and such a greenish color. i think with that said itd probably be a bad idea to add the stuff to a hydroponic grow as it might lead to clogging (but, ive never personally tried it in hydro so dont just take my word for it!). the stuff is definitely super concentrated so i would either go by the bottle's recommendations or even use less than recommended. i don't like how the ingredients are so secretive. honestly, it smells like urea or some kind of balsamic dressing gone wrong.