More pictures and projects today!

What could be the culprit behind these yellow leaves?

380 ppm, 5.8, 85-90F, 85+F res temps
Now with the ac ducted I shouldn't have a problem with temps outside of the res and hopefully will in turn lower res temps. If not it's back to the store to pickup some of those freeze packs. How many do you recommend in order to lower 10-15 gallons of water 10 degrees F?

Thanks!
cmasfca Reviewed by cmasfca on . Second grow log, obviously Hey guys and gals, after a hiatus from the forums due to moving and finishing school I am back for another installment of cmasfca's dumbass attempting to grow some pot :) This is technically my third grow, but let's just not talk about my second. I didn't devote nearly enough time to my babies and they sure showed it. A little advice to everyone pondering the idea of moving while in the middle to late stages of flowering. DON'T! IT'S ALL BAD! As nerve wracking as it was to empty my Rating: 5