Yeah curled down and dark green leaves is too much nitrogen. must be your soil. I am also growing two of the Critical Mass from Canuk seeds right now. They are in week 5 of flower. Did the same as you and manifolded. One I left only the 8 colas, the other I left all the side branches. Growing them in coco and Advanced Nutrients organic (just the base nutes),. My leaves aren't as green as yours, and my leaf tips are actually burning a bit and curling up. I added a bit of bat guano and molasses, so that must be what is causing it. Advanced nutrients is working really well, but I plan to go to Gaia green organic dry amendments for the next go around (hate mixing nutrients every day, I would rather just water when dry). I seem to go through way too much liquid nutrients for one grow, and the cost just isn't worth it.
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