heat stress or nute burn

I have read throughout the forums and basically know I either have heat stress or nute burn.

My light (250 watt MH) was very close so I am leaning towards heat stress and have since moved my light further back.

Indoor grow, FF Ocean forest soil, big bloom (1 tbsp/gal) and grow big (1 tsp/gal) nutes right now. I only feed them nutes with every other watering.

I have been keeping my light rather close to my plants because they seemed to love it and have grown very short and bushy. I am thinking maybe I just kept it a little too close for a little too long. The light was probably only 6 inches from the plants, maybe 8 inches, and I know that is too close.

I just want some other opinions so I can make sure its not my nute solution.

upclose pic

different angle

kind blurry but you can see the yellow dots

thanks for any help!

nute burn,run a ton of water through soil,back way off on nutes,ff soil has nutes already