Hi all, I'm new to the hobby with a 20 g high. It's cycled and I have 6 black skirt tetras and recently added 4 julii corys. I want to add 2 more Juliis soon (6 total) and am wondering about adding a single Bolivian Ram later on, and possibly even a dwarf gourami or honey DG. Would they all fit and get along in my tank? Thanks!