Are you sure it wasn't just from the lack of air in the tank? That why people always recommend extra aeration when treating with mela/pimafix.Matt724;3671254; said:yea sorry man. When he dies, put him in the freezer and take him to the lfs and ask them to do an autopsy to tell you what happened. To me it looks like some sort of cancerous tumor, but I'm no biologist. If you say it's too late for salt, get some pimafix and overdose on that in like a container or something and stick him in. Pimafix has some pretty thick traces of clove oil. knocked out 7 of my cardinals (as in killed them, not just put them to sleep and it wasn't on purpose)