If You would like a multicolored tank with interesting, but smaller fish in it you may look at a college of Mosquito Chili Rasboras. I'd say this type of Betta is a little more difficult to keep as a result of fragile crownlike fin texture. This curious-hunting Blue Dolphin cichlid https://aquariumcleaningservice.news.blog/2025/01/16/what-should-be-your-first-steps-to-set-up-an-aquarium/