the plants are little over a month old, probably a month-and-10 days since they broke soil. I think the plants are experiencing "Wind burn." The fan, as you can see in some of the pictures is positioned below the plants blowing upward, and for the duration of the grow i've had it on full blast, thinking only that this would strengthen the plants, not do any harm.
For a while I was under the impression that I was dealing with nute burn but, i've been really dutiful about watching the resevoir - topping off, not letting the TDS get toxically high (i've kept it in the mid 600's to lo 700's.) Upon recent inspection I realized that all the yellowing is occuring the side of the plants being blown by the fan. I seem to remember reading about "Wind burn", back when overgrow.com was still the monument of empirical knowledge that it was. Anyone have any information appertaining to "wind burn."
I've turn the fan down to its lowest setting, which i believe the plants should agree with more.
Any help, guidance, insight would be appreciated duly.