Terrariums require a soil that is both moisture retentive and well draining, to allow air and water to move through freely so nothing becomes waterlogged. This mix is the perfect blend of organic and mineral matter to do just that, and works perfectly for open and closed terrariums, as well as potted plants that enjoy high humidity and have fine roots. Activated Charcoal, Biochar, and Zeolite help remove impurities, bark supports a bioactive ecosystem, while sand ensures the mix won’t go muddy over time. Ideal for healthy, long-lasting terrarium environments.