Based on the popular substrate formulated by the Atlanta Botanical Garden, our ABG mix is the ideal substrate media for tropical or forest dwelling reptile terrariums. This soil mix retains moisture helping to boost ambient humidity without slowing drainage and drowning live plants. Microfauna, like isopods and springtails, thrive in our ABG mix due to the amount of organic compostable materials that create an abundance of food both for them as well as vital nutrients for optimal plant growth. Terrarium or even houseplants can be potted or planted directly in damp ABG mix without any additional soils or mixes. While other mixtures contain cheap false bottom rocks as an alternative, we use the true to the recipe tree fern fiber to ensure quality substrate.