the damaged leaves will not get better the damage is done, but the new growth should be green and better. Also in soil sometimes it takes like a week or 2 (depending how big the plant is) to see better esults, but the yellowing should stop and the spots should not spread any more after you see the plant getting better. I dont know what it is but lately this same problem is coming up. Mabey its just the strains that peoples are into now? those hard core indica strains that will grow alsmost anywhere are not in everyones garden anymore, people want to try the more hybrid stuff is what im thinkin, but im prty lost on this too?