Remind me when did this all start? Could totally be an aggression issue.
Yes on the freshwater dip. Is the fish starting to perk up since the separation? Hopefully you won't need to do much else.
I'm not sure exactly when, sometime either lastnight or this morning. My wife didn't notice anything out of the ordinary yesterday when she fed them. I work out of town so I wasn't home yesterday. She seems slightly worse now having trouble trying to keep herself upright