I started my seeds about 3 weeks ago two sprouted out, one burnt off before even opening. 3 havn't sprouted. now the only good one so far is starting to turn a little yellow and brown, probably only 3 inches so far, now there in separate garden cups in a fish tank with a fluorescent aquarium bulb till i get my setup ready. Is the yellow leaves a result of over nutrition or something else? And same for the non-sprouted. *They were all feminised seeds*