Exo Terra Bioactive Terrarium Substrate, 2 kg Volcanic Soil for Planted Setups

Exo Terra Sub Stratum is a natural volcanic substrate for bioactive planted terrariums, made from mineral-rich volcanic soil and supplied in a 4.4 lb (2 kg) quantity.

• 4.4 lb (2 kg) quantity — provides substrate for a bioactive planted terrarium.
• Volcanic soil from the foothills of Japan’s Aso Volcano — brings naturally occurring minerals and nutrients to planted setups.
• Andesitic and rhyolitic tephra — forms the natural volcanic material in the substrate.
• Porous composition — supports drainage and aeration around plant roots.
• Crumbly, lightweight structure — provides a habitat for beneficial nitrifying organisms.

Bioactive planted terrariums need a substrate that supports vegetation while helping create conditions for a functioning ecosystem. Exo Terra Sub Stratum is made for these planted habitats, where plant growth, animal life and biological activity share the same environment. Its natural volcanic composition and porous structure make it suitable for setups that need drainage, aeration and appropriate moisture levels.

What is Exo Terra Sub Stratum designed for?

It is designed as a natural substrate for bioactive planted terrariums that support plant and animal life. The volcanic soil contains abundant nutrients for plant life, while its structure supports the beneficial organisms involved in a bioactive environment. This makes it a foundation for planted setups where biological processes help manage organic waste.

• Made for bioactive planted terrariums.
• Supports vegetation and animal life in the terrarium environment.

How does the substrate support drainage and terrarium cleanliness?

Its porous composition allows drainage and aeration, helping prevent waterlogging and support proper moisture levels. The crumbly substrate also provides a place for beneficial nitrifying organisms to establish. Its biological processes break down organic waste, and the substrate helps eliminate ammonia and unpleasant odors.

• Drainage helps reduce waterlogging.
• Biological activity helps decompose organic waste.

What is the substrate made from, and where does it come from?

Exo Terra Sub Stratum is natural volcanic soil sourced from the mineral-rich foothills of Japan’s Aso Volcano. Its volcanic material consists of andesitic and rhyolitic tephra. This composition supplies naturally occurring nutrients and creates the porous, crumbly texture used in planted terrariums.

• Origin: foothills of Aso Volcano, Japan.
• Volcanic material: andesitic and rhyolitic tephra.

Exo Terra Sub Stratum suits terrarium keepers building a planted, bioactive environment for vegetation and animal life, particularly when drainage, aeration and biological breakdown of organic waste matter to the setup. Its volcanic soil composition and porous structure make it a substrate for bioactive planted terrariums.