I already have a phototron and I am planting with dirt, what I wasn't getting was that hydroponics from my understanding is without dirt. So there is really no site right now for phototrons that I can find. But now I have a ? why are 2 of my plants @ the top tilting to one side? They are 2 weeks old and they vary is size of 8, 5 and 4 inches tall right now. Any ideas?