Sikkkaanswered grow question a year ago May not be the best to answer this, but I see we are using the same light, same tent, same nutrients and maybe pretty much same soil. Can be smth with nitrogen, maybe toxicity, I'd use less Bio Grow or it may be smth related to the Light. When i bought it some people were saying that it may be too strong for some plants(especially for autos) and that you need a boost of co2 or smth like that to make sure you have no problems. I'm only using my light at 75% and it seems enough to me, not much of a difference i think..