My first grow, I had the same problem. Grew four strains, one being White Widow. Got a few weeks into bloom, one day after I watered and nuted, most of the top leaves looked pretty much like yours. Like a claw but pointing upwards, with brown and burned spotting.

My advice is to flush the affected plant(s). There is a sticky covering flushing here.
http://boards.cannabis.com/plant-pro...ml#post1840641

If the other ladies are happy with their food, then keep feeding them at the current rate. Then just dilute that food with pH'd water for the querky querkle. :stoned:

You didn't say what kind of Fox Farm soil you were growing in. If it is the Ocean Forest (?) stuff, I hear it is very hot so beware.

Why did you change your pH to 6.0 this watering? You should be around 6.5 - 6.7. I don't think this is your main issue but it may be secondary to the overnuting.

Good luck. :thumbsup: