Create a thriving bioactive terrarium with Exo Terra Sub Stratum, a premium volcanic substrate designed to support lush plant growth and a healthy ecosystem. This natural volcanic soil is sourced from the mineral-rich foothills of the Aso Volcano in Japan, ensuring a nutrient-rich foundation for your terrarium. Formed from andesitic and rhyolitic tephra, Sub Stratum is ideal for bioactive planted terrariums, providing the essential elements for flourishing plant life.

The porous structure of Exo Terra Sub Stratum allows for excellent drainage and aeration, promoting strong root growth and preventing waterlogging. Its friable, low-density composition fosters a flourishing population of beneficial, nitrifying bacteria, creating a self-sustaining and living ecosystem within your terrarium. These active beneficial bacteria decompose biological waste, keeping the terrarium clean and healthy.

Exo Terra Sub Stratum can be used in several ways to enhance your terrarium:

• As a Sole Substrate: Create a base layer of 1-2 inches (2.5 - 5 cm) for optimal plant growth and bacterial activity.
• As a Drainage Layer: Use it as a bottom layer to improve drainage and prevent root rot.
• Mixed with Other Substrates: Enhance the nutrient content and drainage of existing substrates.

Transform your terrarium into a vibrant, self-sustaining ecosystem with Exo Terra Sub Stratum. Weighing in at 4.4 lbs (2 kg), this substrate provides the perfect foundation for a thriving bioactive environment.