hey, you're the coco-nut, not me!
I'd say you've covered the bases though,...
Odissey, coco is a specialized soilless medium, it can't be run the same as true soil or things will go sideways soon enough,... true coco is difficult to overwater because of it's physical properties (great draining namely), but it can happen,.. typically coco is always fed, never water alone, usually with a milder ppm solution; you must take pH and ppm going in, and generate at least 15% run-off each time, testing that for pH and ppm as well. This is how you monitor both salt build up levels and pH in-pot,...
I think the roots took a hit, which makes the plant shaky on watering responses and feeding,.. both over and under watering cause drooping but for entirely different reasons,... Did the pots have free draining, no sitting in saucers with excess? In any case, this could explain the whole deal here with wilting and paleness....
That Truncheon unit used a different TDS scale than most, so beware! Typical conversion is 1.0EC = 500ppm, Truncheon is 700ppm... TDS/ppm is not a standard scale, but EC is...
If you have a root tonic, start using that along with feeds; make sure they drain well, and start your in & out testing!
