So for about a week now my cbb has been swimming in the same figure 8 pattern consistently and with a lot of vigor, it appears stressed out. He hasn't really chilled other than to eat or when the lights go out. Nothing new added to the tank. All fish have been QT'd and params are spot on. The cbb has been established for 8+months and still eats like a pig. No aggression in the tank either. Anyone else have experience with their cbb swimming like this?