SKU: 35335439178

Exo Terra Sub Stratum - Bioactive Volcanic Substrate

Sale price$17.99 Regular price$19.99
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Description

Exo Terra Sub Stratum - Bioactive Volcanic Substrate3 Ways to use Sub Stratum: As a sole substrate As a drainage layer Mixed in with other substrates Sole Substrate When Exo Terra's Sub Stratum is used as the sole substrate, add a layer of 2,5 5 cm (1 2 in) to the terrarium. The live bacteria will activate when the substrate comes in contact with water or waste. The organic matter such as left over food and animal waste will decompose over time. The absorbing properties of volcanic ash will eliminate

3 Ways to use Sub Stratum:

  • As a sole substrate
  • As a drainage layer
  • Mixed in with other substrates

Sole Substrate

When Exo Terra's Sub Stratum is used as the sole substrate, add a layer of 2,5 - 5 cm (1 - 2 in) to the terrarium. The live bacteria will activate when the substrate comes in contact with water or waste. The organic matter such as left over food and animal waste will decompose over time. The absorbing properties of volcanic ash will eliminate odours by trapping the decomposed materials. Rinse the Sub Stratum and replace partly every 12 months.

Drainage Layer 

Add a top layer of biological substrate to the Exo Terra's Sub Stratum layer for optimal bioactivity and drainage. Plants can be secured in the top layer (eg. Exo Terra's Plantation Soil) while their roots will thrive in the sub layer of Sub Stratum - resulting in optimal growth.

Additionally, an inorganic layer can be added first for even better drainage (Exo Terra's BioDrain) to allow excess water to flow through the substrate to avoid saturation and anaerobic bacteria to outcompete the beneficial bacteria in the Sub Stratum substrate. Use the BioDrain Mesh to separate the BioDrain layer from organic matter to penetrate the underlying layer.

Use a top layer of leaf litter to provide dry areas, shelter and dwelling surfaces for all organisms in the terrarium. In the meantime it will prevent evaporation of the underlying layers.

Mixed-in

The secret to growing healthy plants begins with the soil. Naturally, healthy soil contains living microorganisms — from bacteria to fungi, protozoa and arthropods. Together they form a choreographed exchange from the recycling of nutrients to the decomposition of organic materials.

By mixing the Sub Stratum with other organic substrates, you enrich any substrate with the required minerals like calcium, nitrogen, potassium and phosphorus. It also aids in the water retention capacity and provide adequate air supply to the roots.

Only use tap water treated with Aquatize (PT1979) in bioactive planted terrariums to remove heavy metals, chlorine, and chloramines.

The regular use of Turtle Clean (PT1998 or PT1999) to add extra beneficial organisms to the terrarium water will support the biological filtration capabilities.

Key Features :

  • Natural bioactive soil
  • With live beneficial bacteria
  • Keeps the terrarium clean & healthy
  • Eliminates ammonia & odours
  • Great drainage capabilities
  • Ideal for bioactive planted terrariums
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 35335439178

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VFlorida
Cuba, US
★★★★★ 5
Functional and beautiful!
Item Package Quantity: 1, Color: Silver
This towel holder is a fantastic find! It is always great when a product exceeds your expectations and this towel holder is exactly that. At first, I was not sure if the price was worth it but when I opened the box, I was pleasantly surprised by the quality of the product. It is solid and well made with a heavy base that makes pulling paper towels with one hand a breeze. The mandrel is thick and provides excellent rotational ability. Overall A+. I highly recommend spending a few extra bucks on a functional piece that enhances the overall appearance of a kitchen.
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Reviewed in the United States on April 7, 2026
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Laura Maness
Grantham, US
★★★★★ 5
Looks good works great
Item Package Quantity: 1, Color: Silver
This is a nice paper towel holder. I keep it on my counter and it looks great. Its easy to use although I haven't tried it one handed. I like it and I think it was a good price. It was very heavy and works great.
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Reviewed in the United States on May 21, 2026
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Cheryl
Natrona Heights, US
★★★★★ 5
Great and Useful
Item Package Quantity: 1, Color: Silver
This is a great and very functional paper towel holder. It is heavy enough to stay where you put it and the tension arm holds the paper towels really well so that you can actually tear one off with one hand. There is a ring on the top of the holder so, if you have two hands free you could hold on to that for stablizing the holder but it really isn't necessary because it stays in place really well. The only advise I would give is to be sure that the next paper towel on the roll is a bit past the tension arm so that you don't have to adjust the roll to get the arm to hold the next towel. This is a great invention and I'm so happy that I have found it.
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Reviewed in the United States on April 17, 2026
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Lynnmnc
Carnegie, US
★★★★★ 5
Stable and attractive
Item Package Quantity: 1, Color: Black
Love the black, it matches my kitchen well. Very sturdy, more so than the Simple Human one that the tension arm broke. A very good product.
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Reviewed in the United States on May 21, 2026
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Ann
Massapequa, US
★★★★★ 5
Great paper towel holder
Item Package Quantity: 1, Color: Black
This paper towel holder works well for holding the roll while you pull off single sheets. It's heavy and sturdy.
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Reviewed in the United States on April 24, 2026

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