i don't have any other fish in with my betta's now. A while back I used to have a beta and a sucker fish they lived peacefully for almost a year. but he eventually attacked and ate it. even though it was about twice his size!
I bought him from petco..He's one of the finest there is.. I rescued him...He used to live in a small container full of fish poop and blodworm leftovers all over the place! Its like torture...What if they lived in small containers! but icant blame them....bettas are too aggressive to be together..
The one in my avatar is named Elton, after Elton John, and I've got a betta at work whose name is Chumley, we had a naming contest at work. :-p haha Elton was my suggestion and it didn't win, so when I got my own that's what I named him!