interesting eyeco. i think theres alot of contradictory info out there. mine are doing fantastic in 100% coir from hydrofarm (you know the bad stuff everyone talks about). foxfarm grow big nutes not the hydro. and superthrive. i did have ph issues but no longer. i think that was more detremental than not using coco nutes or the right coco or any other supliments. you can do more damage adding more to your solution as well, especialy if you dont know what your doing, with ec, ph, or ppm. i subscribe to the K.I.S.S. theory............. keep it simple silly! dont overcomplicate things you'll drive yourself nuts.
also, if you are on top of your ph and nute solution you wont have any lockouts either, or stress.