You should read the thread I posted a link to.If your over watering it may be your problem,the roots can die and eventually kill the plant.If your not in a rich soil and only feeding them that lite you might be starving them if it's a heavy feeder.Look in the Plant Problems section about over watering first.Veg+Bloom is very safe in my experience and not easy to overdose,tho some have reported that over 400 ppm in veg can sometimes induce flowering even in a 18/6 light schedule.I ran well over 1.5 EC at times with no problems in flower and that's way over the feed schedule.