This one is on hold for a bit. Check out my mantella tank build. If you have a standard 55 and you are going with water, all you really need to decide is how lush you want the tank to be. Fire bellies would allow for really nice, lush, tropical growth. You could have asomewhat decent planted tank with acf's. I'm not sure how destructive they are to to plants and the bull frog, well, they are just plain cool!! Just remember, don't back down from the challenge of building a more elaborate tank. They really aren't that hard. And there's always help in the forums