^All spot on answers. While I've seen it done before, I'll also seen it fail. Lots of hiding areas and plenty of space can increase the chances of it working out, but the chance of it falling apart are also possible. *If* you try, it would be recommended to get them all at a young age and add them either at the same time or within a few days of each-other to reduce the risk of one or another becoming too territorial of the tank too soon.