Our premium Springtail culture is great for use as a cleanup crew for your terrarium/vivarium. We ship them in a proprietary Springtail substrate culture. When they arrive, we recommend immediately feeding them. If you want to use them, you can just dump the entire culture right into your vivarium. Mix the substrate we send you into your terrarium's substrate, and your Springtail population will soon be booming! We offer a Worry Free Live Arrival Guarantee. If your culture arrives dead, simply take photos, and send them to us. We will take care of you!