I believe the discolored leaves are due to nutrient lock-out, with phosphorus taking a hit. All stems are purple now. I have flushed, but probably not enough. Next time.
Thank you, Jon. My son is doing an identical grow, though he is using the standard MH and HPS lights. I'm using LEC (CMH) for veg and flower. It will be interesting to see if the difference in lights makes a difference in yield for our identical clone sets.
First grows are exciting, but scary!
Your plants are quite healthy and look ready to yield well under those lights!
Let us know if you have any questions =)