I've had my betta for over a year and he's been in a 5 gallon, 10 gallon, and now back in the 5 gallon. He's never appeared that happy. I thought he made a bubble nest one time but I think maybe it was just the new filter I used. He has a betta leaf and a floating betta log. I do have mopani drift wood in there, too. I used to have plants but after having some issues I thought it best to get rid of them and I plan to get more, but atm there isn't any in there. He basically stays next to the leaf unless it's feeding time. I thought maybe the filter was too strong so got a sponge filter but nothing has changed... Anyway, I'm getting side tracked here.... My point was that maybe he feels like there's too much room or something. So I was wondering if anyone had a betta in a bigger (for a betta) tank and then move them to maybe a 3 gallon and they do much better?