So.... I'm interested in doing a tropical bioactive in a 55 g tank, and I was just wondering, what colorful species can live together in a bioactive this size? I wanted to get some sort of dart/mantella frog, and I wanted to get a gold dust day gecko too, but I found that that may not be a good idea. Mourning geckos are cool, too, so maybe those. Anyone have good suggestions for something that can live with these frogs, preferably something colorful? This bioactive would be a sort of decoration in my library, so I want animals that will look colorful. And tropical because, well, come on, tropical just looks awesome lol. And I don't need frogs. I just figured that since I've never kept them before, it might be time to try it. And what about day geckos and mourning geckos?