Sure do, John, sure do. There are fish in with my White's. There is also a small soft-shell turtle, who will eventually have to go at some point.

That being said it is a fine line between success and disaster. Your best bet is to get nothing but captive bred animals, that includes the fish, turtles, frogs and/or geckos. Filtration should be strong and sufficient, there are two filters in my tank. You must know all the species you plan on keeping very well. Know everything about their biology. How big do they get? What do they eat? How will you feed the arboreal members of this community? Are any of them toxic? Are any of them carriers for diseases, such as chytridiomycosis? What environmental conditions do the like? When taking about this type of community, there are several balls you must juggle and you can't drop a single one of them.

I have been working with exotic animals just about all of my life. I have worked in the zoo and pet industries, so I do have a lot of experience. Would I recommend making a community set up involving fish, reptiles, and amphibians? No, I would not. Not unless you have a ton of experience, are willing to do all the research, and be prepared for failure. Of course when you fail the animals pay the price. So think long and hard, about this before you try it.