Nute burn?

Growing in supersoil. Been using cal mag....any educated guesses out there thanks!

Could be salt burn, flush the soil every 4 feeds.

Pic 3 to me looks like the start of heat stress. How's your enviourment?

SO sorry for the late response that was a FAIL on my end, i appreciate all input. It is 2nd week of flower, the humidity is 43-47% heat lights out 74-78 (depending on time of day) and lights on is 84-88...i dont feel like it is that hot though when i put my arm under the light hood. BUT they seem to be doing well right now! updates tonight

Did you check the leaves for bugs?