I also do a little excersice sp? every now and again with my bettas, i put up a mirror for only about 5 min to start , it fill make him flare, and then look around for the bad guy . LOL ~~ this wouldent stress him, just NEVER leave it up, only max out time of 10 min . just so he gets some excitment . but its true even my bettas in my community tanks, dont care for the other fish' , they mostly just lay around on a leaf somewhere .... laadeeeedaaaa ~~ thats thier life
I love all my bettas thow , I just lost my oldest red male
that was bad, i had just found a perfect female to try and breed him with too ... O, well I will find her another younger male . Good luck , and HTH ~