SOIL Sick plant please help Urgent!!!

[bycuba]

My plant started to have little curly leaves and brown spots on them. growing indoor, temperature is right, ph looks fine. My guess is maybe over watering or wind burn. it is in 2.week of flowering stage. Thank you.

Here is the photo

https://imgur.com/MsZS92X

[tyler_ hobbyist]

How far away is ur light? What kind/watts? And are u adding co2 or have an air exchange? Also what nutes are u useing? Its not over watering or wind burn. Over/under watering the leaves only droop down and wind burn ur leaves feel rubbery and curl in like an upside down canoe. What is ur temp?

[Canuck147]

Heat stress, light is too close.

[bycuba]

My light was 15 cm far from top of the plant and im using cfl lights. im not adding co2 but i have air exchange. nutes im using at the moment is 0-1-3 (it is called big bud , advanced nutrients) . ihave 21 bulbs each 1600lm and 25w .
As you said guys it might be heat stress , i moved lights little further now but i wonder what happened suddenly 2 days before and here is my sad plant. when i checked temp seems stable between 70-88 f
thank you

[D.A.A.S.69]

Hey bycuba, what size pots are you using ? If I had to guess I would say wind burn or root problems what has your PH out been reading? That's a nice plant, sure need to get her cured.