Possible Heat Stress or Nute Burn.... Help A Noob.

Hey, whats up RIU! Alright, I get home today to find my plants not looking so well. I believe it may be possible heat stress. The temp was reading about 90 degrees in my 4x4 tent. I am using a 600 watt HPS (I turned it down to 50%) which sits about 14-15in above, 5 gallon DWC. I did change nutes yesterday, so it could be possible nute burn. I used distilled water and the GH flora series. My ppm meter read about 360. I have only had 2 clones in veg now for about 12 days, which may be to high.. The ph was about 6. Also, my other clone doesnt look as bad as this, itsts ppm was around 270 yesterday. Please guys, take a look and tell me what you think. Thanks!

heat..hit em with a fan raise lights some and u already turned it down..same just happened to me got new bulbs did the same ish only on a few plants..the more sensitive ones..gl boss

One more vote for the heat stress. Unlikely to be nute burn at that ppm.

Thanks for the quick reply guys! I have already dimmed the light and raised it about 2 feet above plants. Grabbing a fan tomorrow.

Grab an exhaust fan too with ducting.

Quick question. Should i trim the leaves that took the grunt of it or leave them? Is there a chance they will recover? Thanks!

Looks like the heat stress started to cause nute burn. You did the right thing by dimming your light until she bounces back.. Your nutes should be fine after you cool it down but if she doesn't bounce back within couple days I would flush your roots and medium and keep em low for a while..
Good luck..
And yea man don't go pluckin any leaves until she's recovered. No need really at her young age.