I have a 10 gallon tank with a female halfmoon betta and a snail right now. The substrate is natural river rock gravel, there's a couple of silk plants, driftwood and some java fern. I would of preferred to get a male but it was a gift so I guess I have to live with it I plan to get some more live plants over time and create a planted tank. I want something more to my tank. Maybe some small fish or some shrimp. I'm not really sure is she is aggressive. When I had it transfer over to my tank, it would try to "attack me" and hit the glass really fast. I didn't really see any flaring. Now she is a lot more calm and hasn't touched the snail once (well in front of me). I would get ghost shrimp but I heard of some issues with other members. If I had access to RCS and other types, I would definality get some.