Relatively easy to keep, crays can be fed on small pieces of meat, worms, small pieces of carrot peel and the occasional piece of green vegetable matter, such a lettuce leaf, that has had its cell structure broken by freezing.  A clean piece of heavy old wood, perhaps a bit of redgum , will also be chewed on.

Crays will destroy anything in the tank made of plastic and will demolish air stones in quick order.  A simple solution to this problem is to silicone a glass panel diagonally across one corner of the tank, leaving a small gap at the bottom and sufficient clearance at the top to allow for water flow, and to put any air pipes behind it where the Cray can't get them.  You should always handle them with extreme care as even quite small Crays are quite capable of removing the top of a finger with their pincers.