Image reaper, I'm leaning toward doing just what you did. I think I'll flush, then give her just water for a couple weeks, then real weak nutes to start. I suppose it's possible that she could be getting nute burn. I have kinda been giving them a lot of food, but other varieties in identical conditions are thriving nicely. Perhaps it's a PH lockout as Ganja suggests. (I assume this is the same thing as nutrient lockout.) Looks more like burn though. Looks even more like Mg deficiency if you try to find it in the two links I posted above.