Welcome to the new science of reptile substrates. In the past, a reptile substrate was considered a llitter- merely a convenient way to dispose of reptile waste.  Blue Iguana^® recognizes a substrate to be the primary factor in creating a specialized environment tailored to the needs of specific types of reptiles.  A substrate may supplement an animal’s mineral needs, or humidify its surroundings and determine the pH of the physical environment.  A substrate can also be utilized to biologically reduce toxic animal waste to provide a cleaner environment in between changing.  Your reptile probably spends most of his life in physical contact with the substrate that you provide.  Shouldn’t it be the best?