Completely natural, Jurassic dried fern fronds have no dyes or preservatives added, and are air dried naturally to keep natural colors and apperaence. Dried fern fronds, added as a cover to ABG Frog Mix, Eco Soil or other similar substates, create a more natural terrarium surface for frogs and other animals in terrariums, palladariums, ripariums and other high humidity and wet settimgs. Jurassic dried fern fronds and other bidegradables, are  essential in a naturalistic and/or bioactive terrarium, and provide necessary surface area for beneficial bacterial and fungal process to take hold as well as provide a food source for isopods and other clean up crew.