Thanks for commenting guys!
Muddy, it might be P deficiency, I think I might have been about two or three days late starting the nutes. I would be glad to hear from the "maker", JEM, on this. maybe he can spot something.
MM, the night time temp range is 74-80, pretty consistently at around 78, not much I can do about temps for the time being.
Hugo, the two JEMs are 49 days old.
Using the full line of Earth Juice Nutes, Grow & Bloom are supposed to be supplying Mg.
I thought from diagnostic pictures it might be Mg deficiency, but with my lack of experience, I feel like that would just be a stab in the dark without a seasoned grower weighing in.