Overnight massive leave change

So I have to head out of town tomorrow for a week.. Checked my plant this morning, and noticed the top leaves are curling concavely and are getting really dark brown, almost black spots in certain areas of the upper canopy. Lower leaves seem fine.

http://imgur.com/a/eXiQb

Link is for pictures I just took. I know one thing for sure, my plant has out grown my tent, Ive raised the light as high as possible... However these turning rusty almost black and curling like they did over-night has me in a bit of a panic. Ive been using Fox Farms Tiger Bloom every other watering. Literally this shit just happened over night. Anyone have any suggestions or anything? I leave town in less than 24 hours and don't want to just abandon my plants for a fucking week without trying some sort of remedy.

Growing Indoors
Using a LED grow light
Thirsty plant requires watering every 2-3 days
Using TurfKing soil 0.25 // 0.06 // 0.12 is what it says on the bag ( only soil I had available at the time )
Growth stage is around 2-3 weeks of flowering.
PH is around 6.5

sounds like a mix of overfert and warm temp. you don't need to give so much fert. fert with water every other time builds up and is probably way too much. looks like you might be poisoning them. what soil are you using?

Would the heat be causing the curling and would the over ferting cause the spots too be forming? ( they formed Fast, literally over night ) Would flushing it help? The tiger bloom directions stated every other watering, I was even halfing the amount it directed using.

So, I just raised my light too the absolute maximum the tent would allow, pointed the fan upwards to try and re-direct some of the heat, And I will now water strictly using regular water.

you didn't answer my question. what soil are you using?

polishpollack said:

you didn't answer my question. what soil are you using?

Click to expand...

Using TurfKing soil 0.25 // 0.06 // 0.12

Sorry I had updated my previous post with the soil type. After flushing and moving the light as high as humanly possible it seems too have slowed down, However some of the sugar leaves are showing the symptoms. Once the leaf looks beyond repair, Ive been removing them. Any other suggestions?

There's no white damaged spots on any of the lower leaves? Stuff happening that fast makes me think root problems.