For about a week now Ive noticed the my blue gouramI has something going on I don't know if it is stress or sickness. It first started with her poop, its very long 8 to 12 inches and real thin. Now on the 5th day she is swimming wrong and laying on the bottom on her side but not very long. I know that my other gouramI has been picking on her because of all this. My fish get along and I have never had a aggression issues. I did isolate her and watching closely. Any info would be appreciate.