Nute burn?

Day 26 of flower, noticed a few leafs on my cherry og showing signs of what I believe to be nute burn...However I also raised the light above just in case light burn was the issue.. anyone that can chime in thanks ahead of time.

Girls have all been growing very vigorous and healthy. No feed problem so far.
Growing in 3 gal pots-Coco
R.O water
Flora series micro/gro/bloom
Cal magic
Ph to 5.6-5.9 (usually right on 5.

mine looked like that also, mighta over did it so i just fed water n sea weed extract havent noticed it anymore or just cut your feeding to half of the recommended n if you notice it again cut it lower than half