Originally Posted by LadyVictorian
Betta's are solitary fish, they are more than happy to be alone. Also jumping has nothing to do with being happy or not. Betta's jump because it's instinct just like dogs bark so a lid is always a good idea because happy or sad betta's jump.
Also how big is your tank?
I think it depends on the tank size for tank mates, my Splash loves his tank mates and his little betta 'girlfriend' rarity. They never fight o3o and he can't make bubbles because of the constand moving water from the filter ( So no babies~)
I wouldn't recomend any tank mates if your tank is less than a 5 gallon. It woud just cause stress.