thanks for the compliments on my babys.going pretty good so far for my first budget grow.but today they have some yellowing and burnt tips that curl under.not sure if it's nute burn or nute deficiency or heat stress or a little of both.it has been realy hot this last week.the ac in the room the cabinet is in was having a hard time cooling.it was around 90 in my grow chamber.it"s hard to compare my leaves to the plant problem charts.and alot of the deficiency cause close to the same yellowing and burnt tips.it's my first grow so have no experience to go by.i know some yellowing during flowering is normal. but brown burnt curled tips isn't normal from what i know at this point .so what do you guys think?