I was not serious when I said half a cup per gallon. If you're using calmag there is no need for the epsom. If you're growing in soil you likely don't need the calmag either.Sorry @jcdw602 and @xtsho I think I can take things the wrong way when they are written as opposed to verbal. But now it seems you both have different views on it, this is the hardest part of this. I would appreciate it if you were more clear for my 8 year old brain... but I really don't care anymore. sorry if I offended y'all. Good luck, I'm too dumb for this shit.