Josh's Frogs Milli Mix Calcium Enriched Millipede and Isopod Substrate (2 Quarts)Brand: Josh's Frogs Features: COMPLETE SUBSTRATE for invertebrates like Millipedes and Isopods with hard woods, organic compost, leaves, and trace minerals like their natural environment INCLUDES CALCIUM which is important for your pets health; it promotes molting and exoskeleton growth EASY TO USE, just moisten with distilled water and mist to maintain humidity ONLY ONE BAG NEEDED for a small critter keeper. 10qt size available for larger tanks MORE