I have a four gallon tank I would like to stock with a fish preferably more than one but a single betta can work. I have done the betta route, and the white cloud minnow route(IMO WC minnows need a minimum of 10 gals if not more). I am thinking maybe dario dario since they don't seem to be big swimmers? Rasaboras to me need to be in a well planted 10 gallon since they are active. Any thoughts would be appreciated.