Blue Dream - amateur learning as we go

Oops I guess I hadn't taken any photos for 10 days and they are all under the grow light... In this week I'm starting to see a lot of the white pistiles and I think that's really bad. I don't know. I did make sure I don't have any light leakages though. Also, the very first stems/leaves from the original mother plant (that had been cut in half for cloning) have started to die off (but that started last week I think) so I've pruned them off. Maybe this is nutrient burn from the Fox Farm Micro/Grow nutrients that I've been using. Otherwise not really seeing any signs of burn.