the coco that i do have is 100% coco. i was talked into it but found out coco in recirculation systems is a no no (yes i use aqua flakes and nug is so bomb as long as i am flushing), which is why i am flushing weekly until coco is phased out. added cal mag to nutes today and watered the soil that was dry, we'll see how that goes. cal def would explain my cupped, thin, and twisted new shoots. mag def would explain lower leafs turning yellow and dying out. i think jcdws602 is right, need cal mag for my r/o water. i put cal mag into my veg rez (hydroton) so ill post those results by tomorrow. i am gonna put it into my baby rez too (with new nute change). i only used 1.5ml/gal for hydro which brought ppm of plain water up to 150, sound right? i used 3ml/gal in my soil. i am worried about putting it into my flower nutes though as it contains nitrogen. any other cal mag supplements without nitrogen that i can use while flowering to retain that healthy plant? and i use shooting powder last 3 weeks of flower only. one more thing, do u guys water your soil with nutes every watering or every other watering or what? thanks a million bro's.