My mystery weed grow. */comments always welcome/*

I dont think I should have kids anytime soon. I dont even want to think how worried Ill be all the time if Im responsible for a human. I have been battling heat since day one of this operation and one plant is growing vigorously while the other is a little stunted. And now it appears that a nutrient deficiency has shown its face. I was so worried about nute burn so much that I may not have been giving it enough food. I've heard that this looks like a nitrogen deficiency and that I should add some cal-mag. Does everyone concur?