I have been putting together a 37-gallon community tank, and my last resident has been added. This is my first tank in 20 years, and it has been a blast putting it together. Currently it holds ember tetras, green neon tetras, bronze corys, a mystery snail, a couple of nerite snails, red cherry shrimp, some pest snails, and now a betta. I may need more algae control in the future, but right now the tank is balanced and just needs food and occasional water top offs.
I bought the betta from my lfs which keeps their bettas in community tanks, so he was already used to other fish. My corys also get the occasional zoomies, and I was worried about his reaction, but he just ignores it. The betta adventures so far:
He is the calmest, most docile betta I have ever seen. He pretty much hangs out at the top or in the tiger lotus and minds his own business.
He can see his reflection on part of the tank, and he is trying to figure it out. It has become less and less, so I think it will eventually stop.
He did look at some of the shrimp with evil intentions, but once he saw how fast they are he gave up. I have seen them swim right in front of him, and he ignores them. I even saw a shrimp land on him while he was at the bottom of the tank. I'm sure the shrimp fry won't be as lucky.
My corys keep trying to school with him. So far he hasn't been that interested, but he doesn't become aggressive either. It will be interesting to see if he hangs out with the cory gang in the future.
I apologize for the picture quality. I have the lights down while he settles in.