What does your ph read and is your meter nicely calibrated?... Check that first. I'm looking at the leaves lower down below the canopy, and I can see what you mean by the 'mix bag' deficiency, little signs of quite a few things possible... You have purple leaf-stalks too?
Bear in mind it's bloody hard to say under LED, you have a cool white fluorescent you can use for a pic or two, it'll really help those looking to help you better...
When it looks like a bunch of things, get some litmus paper and test the medium run-off just in case it's ph, ph lockout will cause signs of damn near everything. And if it IS that you better move fast man.