Yellowing help

I'd get your pH dialed in. It looks like some sort of a nutrient lockout. Burning would be alot more evident! If your watering with tap water unfiltered leave it out for 24 hrs open to the air to remove chlorine. Also a cal mag feeding wouldn't hurt! Happy growing!

What I see is nitrogen toxicity and over feeding issues. Ull definitely want to flush and dial her back next time u feed. Make sure ur ph is balanced for proper absorbance of all nutrients. Excess of one nutrient can "lockout" another making it unavailable to the plant(signs of deficiency) but treating the deficiency wont solve ur issue because ur not fixing the toxicity causing ur deficiency.

bronze low on plant? maybe chlorine toxicity? Fe tox can look that color, but i think that happens at top and works down. Before you add anythign or do anything with serious repercussions, do eliminate easier things first... pH okay? recent behaviour with feeding? what's in your feed (check label, don't tell me,lol)? etc etc... check your local water report, if you use tap water.. look up the chemical analysis or dissolved minerals etc..they'll give a range of ppm for a few things. Doesn'tlook like magnesium to me. I have a leaf chart in both diaries.. .around week 3.. go save a copy of the image for reference. read up on the difference between immobile and mobile nutrients on it -- one more way to eliminate possibilities.