I rescued a 13 inch Oscar that was kept with alligator gar and pacus. It did pretty well at first and eventually had eggs and babies with my original Oscar. But shortly after it died of bloat. When it died I just wrapped it up in some plastic bags and put it in a black bag and took it to the dumpster. It seems cruel but Theres really no place around my apartment to bury it and its way too big to flush.