How to start up a colony in Food and Feeding Posted February 17, 2017 I keep both species. The dubias get vertical stacked egg crates, water crystals, and a myriad of food. Bananas, apples, bread, rabbit food, my own dubia feed mix. The red runners are in a shoe box at the moment with a piece of egg crate, same diet. I have 30 some egg casings but no nymphs yet. I clean both colony containers out once a month and keep the frass in a container with egg crate to sort out nymphs and buffalo beetles that get left in the frass. Edit:was going to link pictures but the file size is too big.