My friend is telling me that he just lost about three auratus's due to some type of bloating... He said they were moving around but just started to become progressively lethargic and bloated until some hemoraged. I have never had this problem and thought that it may be some type of bacterial infection. Has anyone ever had this problem? If so, what should I tell him to do to prevent it? I told him to clean out the tank and start fresh.

Thanks for any input.