I was considering getting a betta only I wanted more than one fish, and I was under the impression bettas could really only be by themselves or with a small frog of some sort. I just read that some good tank mates would be dwarf gouramis, head & tail lite tetras, moons, mollies, catfish, or a small red tail shark. Would you agree with that and if so, would they need a large tank? Say, dwarf gouramis and a red tail shark with a betta...