Dubia roaches need good food, dark and we'll ventilated space, I keep my colony of 700+ in a 75 quart bin, that has opaque sides. A large hole is cut in the top for ventilation and it has tons of egg crates. I feed the fruits and veggies for moisture and my own chow for food. They also need heat or else breeding will be slow. I use a heat pad on the side of the bin. But you should try roaches before you start breeding them.