I have 3 of them in there. I think 2 males and 1 female. The largest one has claimed the cave and the other 2 have no good place to call their own. Only been in about a week. They do not like the bare bottom. I am cyclying a couple of smaller tanks right now and will transfer them over a few weeks. Will be a better decorated tank (for photo ops). Was just using that photo to test my photobucket account.