I have no firm decisions on the stuff, one way or another, it could very well be like you suggest, maybe the Superthrive only makes itself obvious when there is a deficiency ... very possible ... I may start some seeds in a few days, depends on what my present clones do ... I will NOT use the Superthrive on one plant, and see if I can see a difference ... if anything develops regarding the Superthrive test, I will post it up ... :thumbsup: ...... :smokin: