I have a 55g with 2 Delhezi and a BGK. I had some Swordtails, but one of the Delz got big enough to make a meal out of them one by one. So it's pretty empty now. I've thought of Angels, a Pearl Gourami, Tiger Barbs, Tinfoil Barbs, Silver Dollars, and Red Hooks. Even some Cichlids. Pretty much, I want an active fish or school in there. Maybe a solidary fish that will swim around...doesn't have to be a school. What do you guys think would be a good mix with the Delz and BGK?