So, as you guys can see the leaves are starting to die, this might mean two things:
1. it's almost time for harvest. The leaves are dying so the plant can focus its energy on creating a better flower.
2. The leaves are burnt because the light has been too close.
I think it's the second, because the trichomes are still clear so it's not time to harvest yet.
Also, I did a little research about when it is a good time to start your flush. Apparently it's best to start the flush when the first trichomes are getting milky. All of my trichome heads are still clear so I put her back on nutritions. I'll be on the lookout for the first trichome to turn milky, when that happens I'll start the flush.