I know this is a very old thread, but I am also sorry for your loss! This thread hit home because my Tiger Oscar just did the same thing almost word for word, and nothing I tried helped. He was 5.5 years old and 13 long in a 90 gallon. Three different antibiotics, two different anti-fungals, and 2 courses of anti-parasitic meds. Nothing stopped it. I also miss his greeting me every day. Thank you for sharing, it helped.