Exo Terra Bio-Drain Reptile Terrarium and Aquarium Substrate - 4.4 Lbs

Exo Terra Bio Drain Substrate – 4.4 lb – A specialized substrate layer for bioactive terrarium drainage. This porous volcanic gravel acts as a bottom layer under the soil to create a drainage bed, allowing excess water to filter through and prevent swampy conditions. It keeps the terrarium soil above from waterlogging, which helps plant roots and beneficial microbes thrive. The Bio Drain substrate enables a natural water cycle in rainforest terrariums by working with a pump or drainage mesh (not included) to keep the habitat clean and the humidity stable.