dr. earth's organic nutrients

This deficiency is on only 2 branches. The issues is at the top of the plant. The plants aren't too close to the lights, the temps/rh are good, the ph is in a good range. From research I have done, it looks like it might be an iron deficiency, what do you guys think? The leave is pale...

So yesterday I added a 315 watt CMH with a 3100k bulb currently running at 80% to my tent along side my SF-1000 and removed the 5000k led shop lights for my kids flowering cycle. So far plants appear to be thriving off of the additional light. Up till now I've seen no signs of deficiency while...