Sometime around Christmas I am upgrading my 5 gallon betta tank to 15 gallon. I know that’s in a very long time but I want ideas. Since I am getting a bigger tank I was thinking I could maybe get some other fish. Does anyone know of tankmates that can be with a betta in a 15 gallon? I really like the look of schooling fish but I understand 15 gallons is probably too small to have a school of fish.