chunking up nicely 'Dee!
There's still some troubles here, and the sides of those pots are a sign of that. All that crusty stuff looks like excess nute salts and CaCO3. Some build up is normal, but that's looking pretty heavy....
pH isn't out of line, but what you really need is a ppm/EC reading of that run-off. To keep it accurate, you must use pure water, RO/distilled pure or close to it that has very low ppm. Drinking water from those self fill machines is fine too... Never pH it for this purpose, it's skews the results! You want a clean, unadulterated reading.
It's entirely possible to have OK pH and bad ppm/EC.
Recall what I said about antagonistic uptake issues? You can feed 'til you bleed, it'll just make matters worse! I strongly suspect too much of something has accumulated in the medium, plus the deposits on the sides (like a damn reservoir)...
What muddies the waters at this stage is the natural senescence of the leaves on top of what the plant is trying to "cannibalize" from them due to restrictions in uptake caused by the ion antagonism...
Fan fading looks mostly N defc., some is normal, some beyond/early for this stage... Color bars harder to say, might some monkey bizz with micronutes going on, or could be more or less normal expression; by itself, not much of diagnostic symptom really...
So, get that new run-off reading using pure water. If it's in the 1000's++, it's too high. Do you know what the ppm's are of the solution going in?
I realize flushing is basically out because of how it's rigged in there, which could be the bitch of a fix otherwise...
