What is the water going in at that it comes out at 6.4?

I didn't mean to suggest a transplant this late in the game either. Like str8 said, it's a normal cycle of the plant for it to yellow and leaves to die, 6 weeks is a little late to start messing with treatments.

However, I have had problems in the past that reminded me of your pictures, and it wasn't normal. In the beginning before I figured out a good system of containers to work a plant up through, mine would look just like yours at 5 or 6 weeks. My yield and quality suffered because of my lack of planning. Brown splotches, burned edges, curled leaves, you name it. I would look in the books and it looked like a combo of everything. No nutrient fixed it. I just needed to figure out how to schedule transplants properly, and how to recognize the symptoms before the plant became affected by it.

Many people have many different methods, and I'm sure they would be happy to tell you. I usually start seedlings/clones in 4" round peat cups with inert soil, about a week then its into 8" square pots with fortified soil while vegging. Usually about 3 or 4 weeks in, I'll notice some of the bottoms yellowing, and a slight sag that wasn't there the past few days. Time to transplant into final container for flower, either 2,3 or 5 gal, depending on your preference.

I guess all I'm trying to say is timing and recognizing the small things your plants tell you will save you on your next run. Consider this first one your price of knowledge. You will be much better equipped next time around.:thumbsup: