Finn's Frog Farm ABG mix is made with the same ingredients formulated by the Atlanta Botanical Garden. Our ABG mix is the ideal substrate media when building your tropical terrarium or vivarium for your pet reptile or amphibian. This mix retains moisture helping to maintain humidity while letting excess water drain through. Your bioactive clean-up crew of isopods and springtails will do great in our ABG mix. Our ABG substrate should be used on top of a substrate barrier placed over a drainage layer to prevent the ABG substrate mix from becoming too saturated with water.