hey guys 
...
Space Brudda, you too ay?
..okay, I picked up a brochure of Elite from my local shop homie,... generally positive feedback from his customers so far, for what that's worth-

...looking at the N conc. and inputs, it seems light on it... not enough to restrict nice growth or anything like that, but theoretically, maybe practically here, it's not leaving much in reserve for late stages when the N input is getting reduced, forcing the plant to dig into reserves sooner that are not very robust...(recall, N is taken up by the plant whether it needs it or not, and any excess is stored for later needs)... it sure looks like it from the symptoms, though seeing it hit up high like this in some cases is atypical,... but something I see that isn't really shown in other info sources is how P defc. can apparently cause this overall paling out and not start with the larger necrotic patches until well into this color loss (
Bud-E, that pic above of the GC's, one on the right, leaf top right side that's pale with dead patches-- classic combo there) ,... that, or in conjunction with low N stores?

--not really sure, just a strong suspicion! I've seen it on my own plants, this yellowing of uppers, and it was not correctable despite foliar and soil dosing of extra's of both, it just slowed it down some...
Pete, I do see the other plants showing this mid-upper level yellowing, which certainly hints at a consistent nutritional issue across the board,.. no way all those pots are pH SNAFU'ed!

So,
Pete and Bud-E looking at the part B and Root Tonic, that combined would seem to offer pretty stout PK inputs, if the applied in equal amounts and perhaps higher concentration,... I'm not sure what your test protocol calls for in terms of other nutes/supp's if needed, to preserve the integrity of the nutrient (alone) testing? Using a different P-K product might queer the test,... Avalanche, not being of significant source of NPK (maybe even secondary) nute elements should be fine IMO,... I love that stuff! Funny smell though, like smoked seaweed or something?

No arguing with the solid nuggetry it promotes though!