Joshâs Frogs ABG Mix is the perfect blend for growing tropical plants both in the home and in bioactive vivariums. This mix is the original ABG Mix developed by the Atlanta Botanical Garden. Each bag is a precise mixture of charcoal, milled sphagnum moss, pine bark, tree fern, and peat. The mixture creates the perfect balance between retaining moisture and proper drainage; it can last for several years if used properly! Specifically designed to break down slowly, making it prime for use in terrariums/vivariums. Each of the multiple ingredients in this precise mix support a balanced ecosystem. Great for springtails, isopods, and other similar insects