Almost 6th week of flower and The leaves on the top are TACOING

My plants are 38 days into flower and only the leaves on the top of the plants are tacoing Im thinkin it could be heat stress because my 1000w is about a foot away my ph stay at 5.6-6.0 im feeding gh micro and bloom mixed with beastie bloomz. What other problems cause the leaf to taco

I was told a little heat stress was good as long as it wasn't that bad the closer you get the light the better???

High right now

Heat probably. Do you know the temperatures?

You could also be over feeding them. They are transpiring at a high rate, which will increase the use of potassium as well. Not good news unfortunately.

I ferted my newly planted clones not to long ago and accidentally did full strength. Within an hour I had my center leaves on three plants taco, I flushed them well then the next day they were fine, if your running a 1,000 like me then you should have your light up to 20inches unless you have a cool tube. you have enough power to raise it and cool them off to "TEST" if its temp.