I want so many fish but what fish go good together?

[katebug12]

What do i do? I'm getting a large tank and i don't know how many fish or what kind of fish go good together. I already have one Betta male and I have no idea what to do. I bought my Betta at walmart should i go back and get more betas?

[okiemavis]

You cannot keep male bettas with *any* other bettas, either male or female, they will kill each other.

That being said, what size is your tank? What kind of filtration do you have?