Stress from heat or nute burn?

Hello I've got a few pics from some sour diesel plants. The plants look good and healthy there is just a very small amount of tip burn here and there and then today I found a few leaves like this. Like maybe 3 or 4 total in the whole room. I'm wondering if it's from the heat or maybe too much nutes? The room I had them in just a week ago was getting up to the high 80s for a temp.

I run Advanced nutrients whole line half strength with Cal Mag every other feeding.

water once every 3 or 4 days as they need it.

feed every water.

current temp is 75°-79° day and 66°-70° at night.

Humidity hangs between 40 and 55

promix hp in 7 gallon pots.

vegged 2 months.

day 22 of 12/12

Two 1000 watt HPS air cooled hoods about 20" above canopy

ph has averaged between 6.0 and 6.5

lots of air movement but nothing directly on plants constantly.

Thanks guys.

pics to follow

Pics

Any ideas?

Very small amount nute burn but not bad at all I would just lower your ph just a little bit down to 6.3. My room run at 80 to 88 all the time and I pull very good numbers of them.
I am all way more concerned what temp it gets down to. Last summer had some of my rooms got over 120 with out a problem.
I find a lot of plants enjoy the warmer temps. I think your plants look fine keep up the good work

Looks like mag def. Try throwing in some epsom salt next feed

I would say that is nothing to worry about the grow seems to look very nice, the close up seems to be nute burn in combo with heat, but that is very very minor nothing to be too worried about. As long as you just reduce the nutes small amount and just continue on schedule you'll be just fine. You don't want your babies in rooms in the upper 80s for too long, it won't hurt once or twice but try to not let that happen often, also if your running co2 you will be able to handle higher temps.

Nute burn dawg, no big deal atleast you know youre plants are drinking

Hey Rio can I post a picture of my outdoor plants to show you ..there massive 6ft and maybe 4ft wide or possibly bigger..I'm stuck thinking its nut burn or the heat.cause it is 100 degrees in my parts of Cali.Any help