Jurassic Reptile Products melaleuca, is a premium grade, tropical substrate. Melaleuca is mold resistant, and highly absorbent. It is excellent for maintaining humidity, as it dries more slowly than many other substrates, such as cypress. Melaleuca substrate is a smaller, granular texture than other mulches/substrates and is more suitable during feedings. Melaleuca sp. is invasive to the southern US, invading cypress forest and swamps, and is an environmentally friendly alternative to cypress, which is a threatened species in many areas. Excellent for snakes, lizards, tortoises, amphibians, arachnids and other tropical critters.