I have one. The biggest thing I would suggest next to tank size is get them to accept non live foods. Mine eats frozen blood worms, ghost shrimp, and an occasional fish big enough to fit in its mouth. Oh and a lid they're jumpers.
He's out all the time. It's pretty much trained eating time. I feed the other fish. His head pokes out then I put in the blood worms. Even the dehydrated ones, ill pinch some put it by him and he eats it.