In order for you a multicolored tank with interesting, nonetheless smaller fish in it you could think about a school of Mosquito Chili Rasboras. They can be found at Snowcap Cave, additionally also in the Snowcap Island docks, they prefer the rainy temperature and will be observed largely at night. https://aquariumtanksonline.blogspot.com/2025/02/how-to-set-up-your-first-aquarium.html