3 runs later. Learned to use approx 2grams per gallon. Under CMH lighting, using bagged canna coco. If I do not use calmag....I get cal and mag deficiencies. I also supplement with cob lighting during flower. Running the MegaCrop dosage as they suggest.
On the calmag....week 4 of flower I start to taper off and stop using it by end of week 5. YMMV. Happy grows!
2gr/Gal of what? The greenleafs clmg?