Fan Leave Problem!

One plant has some coloration on the 2 fan leaves. Also curling downward. Any clue? I feed with good clean RO PH Water with Fox Farm Ferts. Also flushed them about 5 days ago when I noticed the symptoms. Possible a deficiency in something? Got pics too.

temperature?

73-90. But 90 only maybe once a week at the hottest part of the day.

you have nute burns or temp problem cut those bad leave off all there doing is useing up your energy on the plant sooner or later you will end takeing those leaves off thell just keep on getting moore yellow and more yellow!!and anythig over 78 degrees is to hot that will take ur yeild size down for sure!!!

lower your temps...that is heat stress

Its rare if it does hit 90. Right now its hot, the temp inside is under 80. So its rare that it gets to 90. I would say 90 maybe once or twice a month. Its the best I can do. Will cut bad leaves off.

cant really tell from the pics man.

dont cut the leaves off the def will just start taking it from other leaves

Well, I'm not going to worry if it isn't a deficiency. The rest of the plant looks dope. The Bud dev. is great so far. Only in week 2 for flower. Check my journal for more pics! Thanks guys!