Agree, but looks more Zinc to me, on Iron yellowing starts inward and spreads outward, pH may be too high … 
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Since the input and output EC were quite close to each other, I decided to stick with the 100% nutrient strength instead of making adjustments.
Glad I did as they do seem to be coming around now.
Went to grow shop to pick up some new pH drops and they only had strips. Oh well, I got them anyways as was cheap and yes the pH is indeed between 6.0 and 6.3 so it probably wasn’t a pH issue. I’m guessing I was just underfeeding and didn’t switch em to full strength nutes as soon as I usually do.
Will still have to cram em all into one tent and start anew. So basically lost half my yield. At least I’ll be on a staggered finish time again…
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Just like store bought Mr Lehey!
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