This terrarium grade Sphagnum Moss naturally has anti-fungal and anti-bacterial properties. We recommend using this in between the substrate and leaf litter layer, to help hold humidity in the bio-active region of your reptile, or frogs vivarium. This greatly benefits your clean-up crew, and micro fauna, such as Springtails, and Isopods. We offer the Worry Free Guarantee. If you don’t love it, we will buy it back!