Update on Luchi:
He seems to be doing slightly better. His pectoral fins which were severely damaged seem to be growing back already. I have been administering salt baths which he actually doesn't seem to mind. He's also been in a quarantine tank with some Jungle Fungus Clear. I hope he continues to look better. His color is just very dull and his fins have lost all their fullness.
His appetite has NOT changed. He's as hungry as ever which I feel may be a good and positive sign. He even ate his first bloodworm yesterday!
Hopefully he's getting better! =]