Exo Terra Sub Stratum Bioactive Terrarium Substrate, 4 kg Volcanic Soil

Exo Terra Sub Stratum is natural volcanic soil for bioactive planted terrariums, supplied in an 8.8 lb (4 kg) quantity and designed to support drainage, aeration, and beneficial biological activity.

• Volcanic soil from the mineral-rich foothills of Japan’s Aso Volcano — brings a natural substrate to planted terrarium setups.
• Porous composition — supports drainage and aeration around plant roots.
• Crumbly, lightweight structure — provides a substrate in which beneficial nitrifying organisms can thrive.
• Biological waste breakdown — helps keep a bioactive terrarium clean and supports a self-sustaining ecosystem.
• 8.8 lb (4 kg) quantity — provides substrate for a bioactive planted terrarium setup.

Bioactive planted terrariums bring plants and animals together in an environment where substrate, roots, and beneficial organisms all play a part. Exo Terra Sub Stratum is made for that setting: its volcanic soil composition supports plant growth and biological activity, while its drainage properties help maintain suitable moisture conditions. It is intended as a foundation for planted terrariums rather than a general-purpose household soil.

What is Exo Terra Sub Stratum made for?

Exo Terra Sub Stratum is designed as a natural bioactive substrate for planted terrariums that support both plants and animals. Its mineral-rich volcanic origin provides nutrients for plant life, while the substrate helps establish a bioactive environment. It is also designed for terrarium setups with a diverse range of species.

• Made from andesitic and rhyolitic tephra, a type of volcanic material.
• Intended for planted terrariums with bioactive setups.
• Designed to provide a foundation for vegetation and terrarium animal life.

How does the substrate support drainage and plant roots?

Exo Terra Sub Stratum has a porous composition that promotes drainage and aeration, helping prevent waterlogging and maintain proper moisture levels. Air and water movement through the substrate supports root development, while the soil’s nutrients contribute to an environment for plant growth. These properties make its moisture management relevant to both planted areas and the animals living in the terrarium.

• Porosity supports both drainage and aeration.
• Its drainage properties help prevent waterlogging.
• The substrate is intended to maintain suitable moisture conditions for plants and animals.

How does Exo Terra Sub Stratum contribute to a bioactive environment?

Exo Terra Sub Stratum’s crumbly, lightweight structure supports communities of beneficial nitrifying organisms. These organisms take part in biological processes that break down organic waste, helping the terrarium remain clean. The substrate is also designed to help eliminate ammonia and unpleasant odors, contributing to a more comfortable environment for terrarium inhabitants.

• Supports beneficial nitrifying organisms in the substrate.
• Biological activity helps decompose organic waste.
• Designed to help eliminate ammonia and unwanted odors.

Exo Terra Sub Stratum suits terrarium keepers creating a planted, bioactive environment for plants and animals, particularly where drainage, aeration, and biological waste breakdown are part of the setup. Its volcanic tephra composition, moisture-supporting properties, and role in fostering beneficial organisms make it a purpose-designed foundation for bioactive planted terrariums, rather than a substrate intended for general household planting.