I think a firebelly toad will pick on the betta. They will probably try to eat it! Not sure if that is too great of a combintation...
tricksterpup said:Shadrac,
Toads and frogs will eat anything that will fit into their mouths. If you would put anything in your tank, I would try common guppies. They are fast and would pretty much leave the toads alone as well as avoiding being lunch. And plus they would breed and keep a constant supply of fry for you.
jim