Just the opposite Growmie, lower leaves tend to show a nitrogen deficiency 1st. It’s a mobile Nutrient so if the upper growth isn’t getting enough nitrogen it’ll get pulled from the older and lower growth 
Plants are looking good. @OGIncognito thank you brother and the way you explained it registered!!!
Like a Leader 
@OGIncognito
I have a perfect example in my mother space. I grabbed a bottle of RO not thinking and added jacks for tap. About the second feeding lil rust spots on bottom leaves etc. Then it hit me 
so next round was a shot of epsom.
YES, YES, YESSIR looking Good!!!
Looking good for sure.
Have you tried some cal-mag? I didnt read it all so… I would give them some if you have not done so already.
I had a plant do that to me one year. I called her my albino plant. It was a white widow, probably a genetic variation. I grew 4 all ilgm all photos 2 were exactly alike and two were totally different. One was a stubby indica then the albino. She never changed from a light pale geen the whole grow. Same feed, i even tried more food and nothing. The rest had perfect foliage the entire grow. Just a variation.
i think it was thisgrow.
Gorgeous all around!
Nice looking grow. I like the handy drain tray and space.
Its a hydroponics box fully computerized with LED dome lights, reservoir, pumps, carbon filters, air stones, fans, co2 port, CFL bulb or LED option.
You can Run it 18/6 then 12/12 for flowering.
Its a great option for winter grows in BC Canada.
I just removed the water and pumps, running dirt only now.
It is probably my best crop yet and will maybe do hydros when i get better at this.
Unfortunately the company sold and my free support is gone.