no no mate, you're right, and I'm under the influence!
I won't get my clockweights in a tangle here -
...honestly, I'm not 100% sure what scale that blip on flush solution was based on,...want to say NaCl 500ppm..... Regardless, a weak solution by any measure, IF he chooses to pull the Autopot and find out if it's overloaded in there by testing some run-off. Let's see if it worsens significantly first...
Of course
you don't need to test, you're the Sensei already doing the plentiful run-off thing -
... this has been the advise dilemma concerning any bottom-fed rig, what to do when something is wonky in-pot with coco -