As for exercise, thug, you don't need too much room. you can help them flare by showing them a reflection. Flaring is very good excercise :) It's the same idea as hamster wheels or those machines at the gym. very littlw room. but very good excercise.
Some say flaring stresses a betta out. this is certainly true for individual bettas. you can work around your bettas's personality and vary their exercise times.
Mu betta can flare all day XD
I haven't insulted you, I would appreciate it if you didn't insult me.
No, I do not believe that the leading cause of death in bettas is obesity. There are so many things more prevalent. Yes, constipation, but that isn't obesity, that is over eating. Not the same thing. And many "fat" fish are actually sick fish. Swim bladder issues make a betta look "fat" and parasites.. so no, I don't believe you. And I am still asking for proof. I do my research, thank you very much. You, on the other hand, seem to pull things out of thin air all the time. "Facts" that can not be substantiated.
When I prove you wrong you try to mock my facts in the simplest terms Betta in bowl eats a lot no exercise obesity then a magical thing happens that destroys the kidneys.