I fill a plastic tub half full of peat moss. Add the beetles, larvae, or whatever you have for a starter colony. Beetles need water, larvae do not. Beetles need a paper egg carton for roosting. Beetles will eat wheat bran, dog food, table scraps, or many other things. Beetles will lay eggs in the moist peat moss. Larvae will burrow down into the peat. Don't worry about adults eating eggs, larvae, or pupae. They are not cannibalistic. You have to be patient.