isnt your ec just another way of saying ppms? my meter has both ppms ec and something else i dont use. but it really helps me when im doing my ppms. i recently added big bud and i just added enough ppms to kind of kick in and i noticed it burnt it ever so slightly. barely even noticable but know i know that ppms with a much more potent thing like big bud is un necessary. but in your case stinky your just pro so people have an instict with plants. me no way. my first couple of grows the plants were feretelizer burned and showing defeceincys it was a mess. but this ec /ppm meter i have has personally helped me out a lot. i pin point my feedings.