Hello I have a 10 gallon tank in my dorm and I want to add a little more interest. Most of the fish in it I have had for quite a few years and are a combination from several other tanks (which is why they are not in bigger groups). There are currently 2 harlequin rasboras, 2 white clouds mountain minnows, 3 male yellow guppies, and a bulldog pleco. I'm trying to decide whether to get a dwarf gourami or a male betta. I'd slightly prefer a betta, but the guppies could be an issue. Opinions?