I've got two reg Nepali Rukum plants that are 20 days above soil under a 150w 4000k CMH. One of the plants has some odd rust colored spots on some of the leaves. The spots are not on the leaves from the first node, but they are mostly concentrated on the 2nd node leaves. The third node (last, topped above there) has some loss of color as well, not quite as spotty. I've looked at several of my links for plant problems and can't quite nail this one down. I'm thinking Mag deficiency, I recently top dressed with some Epsom Salts to try to arrest the spread. Plant: Holy Smokes Nepali Rukum Age: 20 days above soil. Lighting: 150w 4000k CMH Growing Medium: Mixture of peat, worm castings, perlite, vermiculite, and calcitic lime (when the spots showed up, just transplanted to new soil today) Water: tap that sits for several days, adjusted pH of 6.4-6.7 The other Nepali Rukum does not have the same spots and is exactly like the above.