I know times have changed and what was good years ago might not be good now. I was looking over Jorge Cervantes marijuana horticulture bible to see how to fix my rust spot issues and on the contrary to what most were saying that its a calcium deficiency, the book said it was a magnesium deficiency And that the best and quickest way to deal with it is with Epsom salts. Either through watering or foliar spray. Is that just outdated info or are people suggesting calcium because calCium and magnesium rely on each other and CalMag has both and that’s what’s best for treating it. I don’t know if that applies to coco though. I’m about to give my bitch an Epsom salt bath if that’s the case lol. Any info would be great.