Until recently I never knew one could get so attached to a fish. I've had Jupiter for about a year and a half and I'm very attached to the little guy. Over the last few weeks he has started acting very strange. He started being lethargic, mainly hanging out in one corner of his tank, and when he does move he darts about frantically. This was about a week and a half ago. He had nothing on his body so I thought it was swim bladder problem or constipation. So I stopped feeding him for two days. But when I started again he still wouldn't eat.
I recently noticed a white/gray "cloudiness" around his face and one side of his jaw is slightly enlarged. It is not fuzzy, or stringy. He doesn't have spots like Ick. He sometimes looks as if he is breathing heavily and his gills are slightly sticking out.
I do not have water testing equipment, but I am going to get some tomorrow.
I can't tell if this is bacterial or fungal. I don't think it is a parasite as he has only had beta bio gold until 4 days ago when the lady at the petstore told me to try freeze dried bloodworms to stimulate his appetite. He didn't eat it so I removed it from the tank.
His fins seem fine, doesn't look like fin rot.
I have to admit I had him in a pretty small tank. No filter or heater and 50% water changes about 1x week. Hopefully I can nurse him back to health and transfer him to a nice, cycled, heated, filtered and spacious home. But I don't want to risk infecting a tank and then getting other fish sick in the future if he is really sick :( I had no idea he needed all of that, but I have spent the last few days learning as much as I can. But the more I read the more I'm scared to try any treatment for fear I could be treating the wrong illness.
As a start I have put him in isolation, 100% water change with treated tap water ( API stress coat+) , and aquarium salt.
Please help me figure out what is wrong so that I can proceed with the best course of treatment for him!
I have attached some pictures.
Thank you all so much for any help