Thanks, John. I'm taking it slow so I don't create new problems trying to solve old ones. I added 1T/gallon in the feedings on Thursday and today. They are really drinking, so I gave them a heavy soak today and they should be good until Thursday. I'll probably hold off on any more Mg now and see if things clear up.Eighties...I saw this comment and felt compelled to comment. MagSulphate (Epsom salts) is a chemical nutrient additive and does need to be included in total ppm calculations. You can burn a plant with too much of anything. So don't assume that it's benign.
My comment is meant mostly for other people reading...
JD