I just keep fish at the moment as I find I can fit far more of them into a 55g.I reckon you could only squeeze 1 or maybe 2 kids in there and the ammonia level would probably be sky high after a day or two
You're right- they are huge waste producers!
Big poopers, especially the little ones. Imagine vacumn-cleaning that gravel! I would go bare-bottom in that tank, minimal decorations, etc...