Exo Terra Sub Stratum Bio-Active Terrarium Volcanic Reptile Substrate

Exo Terra Sub Stratum Bio-Active Terrarium Volcanic Reptile Substrate is a volcanic bioactive substrate (often branded “Sub Stratum”) used for natural terrarium setups. Sourced from volcanic soil, it’s light and porous, promoting beneficial microbial growth and root development for live plants. Use it as a base layer or mix-in to improve drainage and soil aeration. Rich in minerals from volcanic ash, this substrate supports healthy plant growth and helps maintain a bioactive cycle by fostering bacteria that break down waste. It’s an excellent substrate component for those looking to create a self-sustaining, planted terrarium ecosystem. Available in Multiple Sizes