Strang leaf discoloration?

Hello,

Today is Day 42 of flowering- and over the past week ive noticed a little strange discoloration in the leaves. This is my first grow, im not sure if its normal for this strain, or if its some sort of deficiency.

The leave tips have been curling down for the past week, and i flushed it with 5 gal of tap water (sat out overnight) in an attempt to get them to perc up a little.. but no luck

so what do you guys think?? over-worrying? or deficiency?

cooler temps will do that. don't worry man.............nice f%ing plant

No worries-- she looks fine. I'd check the ph of soil just to be safe.