Hi all, I just switched nutes mid grow to Jacks 321. Although I bumped my EC substantially (from 1.4ish to 1.8) I have been dealing with what I believe is a major cal mag deficiency. Has anyone else had this issue? I am using RO water so maybe that is why but I'm just curious if that is a common issue. I added another 2ml/gallon to help but that doesn't even seem like enough.
So if you add cal mag how much you add?
by Motmotsnsurf