[thekoimaiden]

I agree. A 5 gal isn't a good tank for glofish or harlequin rasbora. Both are active shoaling fish and would be bouncing off the walls. A betta is the only fish I'd recommended in a tank that size unless you are experienced with small tanks and small fish. Shrimp are an option, tho

And of course there is always the option of getting a larger tank.