Originally Posted by BearcatShane
And in time, if I do choose to mix it up and put other fish in there like small goldfish and other small fish, will the Bettas tear them up?
Yes they will attack other fish and sometimes their own kind. My wife has had these and currently has one now. She bought two together a few years back,male and female. The male attacked the female and really tore it up. In fact I don't think it lived very long after my wife separated them. So it would be best to have them apart from any other fish you have. They can live a long time. One she had lived about five years.