Iron deficiency?

Hi all I think I might have an iron deficiency but I can't tell. I just flipped to 12/12 hps two days ago. I just added the bigbloom and tiger bloom when I flipped the lights the ph was 6.5 so not bad at all. Any help would be greatly appreciated.

it looks like light burn ? Idk
iron def comes in at 7.5 ish ph

it may be nuts burn, but its not iron def

I'd ease off the off the bloom gear for now and focus on grow, the plants about to stretch and your not feeding it right. Go back to NPK. That's what I've learned man, you gotta feed that stretch. Probably why your leaves look so sad.