A Special Blend of Humus, Peat Moss, Sand, and Carbon Create bioactive terrariums and tropical set-ups. Contains coconut carbon to provide a porous surface for beneficial bacteria to colonize and reduce persistent odors. Use in Naturalistic Terrariums® and paludariums with tropical lizards, amphibians, box turtles, hermit crabs, tarantulas, and other invertebrates. Burrowing and egg laying substrate allows for natural behaviors. Suitable for plants creating a bioactive terrarium may maintain long-term plant life.