Choosing the right tank mates for your betta.

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I'm considering turning my 30+ gallon tank into a community setup with a single betta, a few cherry shrimps, and maybe some neon tetras or similar. I've done some research and I know bettas can be territorial, but I've been getting mixed advice. People keep telling me not to keep a betta in the tank, and the shopkeepers are pushing me to get angel fish instead. I've also thought about just keeping goldfish, like ranchus and orandas. This is my third time keeping fish, and I want to make sure I get it right this time. My first two attempts didn't go so well because I relied on the shopkeepers' advice without doing my own research. Now I'm stuck deciding between a betta, angel fish, or goldfish. I'm thinking shrimps and tetras would be a good combo, but I'm not sure which main fish to choose.

I've had some bad luck with bettas and neon tetras. My betta, the one in my profile picture, is actually doing alright with the shrimp in his 20-gallon tank. The shrimp have even been able to breed successfully.