What everyone said on here is definitely true, Bettas are a gateway fish and having one as a community fish is soley based on the individual. Case in point, I have 10 bettas and I just added 6 neon tetras to my 10gal I just configured to hold 3 of em, my red veil tail, Tina(long story), chased, nipped and killed 1 and scared another so much when I was trying to break up the ruckus he jumped outta the tank. I then moved the rest over to Ike and Flo's side and them two get along well with the neons. It does depend on the fish, cause Tina didn't like the company.