Like i said, bump another 50-100 ppm...mix it up in a separate bucket with water, make sure it includes cal-mag, add enuff to raise the ppms, put an airstone in with the unused nutesoup, until you use it.
Those bottom roots look pretty good, nice white and beginning to branch, but not many; top ones color and lack of new white parts, raises questions....how much gap between water surface and net, are those roots fighting an infection, is there a smell, do yellowish roots look slimy, are you using hydroguard/GFF, have you changed water since you put the plant in that bucket?
The biggest boost i recommended was the nutes, i think timing is just right for those bottom branching ones. It will be slightly higher than the low end here:
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If things get worse or don’t visibly improve in 3-4 days, i’d def swap out water in your bucket.