The bundle includes a culture of dwarf white (20-25 count) and mixed springtail culture. Dwarf Whites & Springtails will serve as a cleanup crew for your vivarium including breaking down matters and uneaten protein. They quickly reproduce and will continue to sustain your vivarium. Both are essential in maintaining the ecosystem of your enclosures. Live Arrival Guarantee (LAG) is included with every order. If you don't see movement right away, we recommend sprinkling some food in the container they arrived in, as they might just be dormant from being in transit. If there are any issues, please contact us within 4 hours of their delivery for Live Arrival Guarantee to be validated.