Dosiface reg's by Archive

I'm thinking the yellowing is caused by a nitrogen deficiency, but I'm not certain. Feel free to share your thoughts if you think you may know what has caused this. Other then the yellowing the Dosiface seems to be doing ok. It put on some good growth since my last post 10 days ago. Fertilized twice in the last 10 days and am now thinking I'm going to turn the lights down to a 12/12 light cycle in a couple days. Fun times ahead. Stay kind