My betta is on his last legs, but I would still like to know if there is a diagnosis for him so I could prevent this from happening to fish I might get in the future. I have tried Kanamycin, Erythromycin, Nitrofurazone, and general cure (Metronidazole and Praziquantel) with little to no improvement. I have been doing daily water changes/ vacuming the gravel and adding seachem stressguard. The only reason I had not euthanized him yet is because he would still eat and swim. I originally though it was dropsy, since his scales would pinecone, but they would only pinecone in a specific patch and the scales would eventually fall off. His poop has looked normal as well. Today he just sits in the corner breathing heavy and he only moves to surface or eat, so I am thinking about euthanizing him soon. However, I would still like to know if anyone knows what illness he has.
These videos were all taken today. I have more media of the disease progression if wanted.