UPDATE:
Good news, Kanaplex seems to have helped! Started treating the 10gal QT with Kanaplex last Sunday and lately Cheech has not been hiding, no stringy feces, eating better & even comes up to the surface to beg when I open the hood. Going to give him a few more days but plan on moving him back to the home tank early this coming week. Since I wasn't sure what the actual problem was (no dropsy, just the problems above), not sure when to suggest using Kanaplex, but it worked in this case!
Good news, Kanaplex seems to have helped! Started treating the 10gal QT with Kanaplex last Sunday and lately Cheech has not been hiding, no stringy feces, eating better & even comes up to the surface to beg when I open the hood. Going to give him a few more days but plan on moving him back to the home tank early this coming week. Since I wasn't sure what the actual problem was (no dropsy, just the problems above), not sure when to suggest using Kanaplex, but it worked in this case!