If you prefer a multicolored tank with interesting, but little fish in it you'll be able to think about a college of Mosquito Chili Rasboras. They can be found at Snowcap Cave, as well as also at the Snowcap Island docks, they like the wet climate and may be uncovered https://www.mediafire.com/file/vmg30mhri0pwe6e/How_to_Keep_Your_Fish_Pond_Clean/file