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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Capt. Spaulding
Waukegan, US
★★★★★ 1
Timex should be ashamed
Color: Black/White/Silver-Tone
Bought this for my wife because she likes my Timex Weekender, but the 38mm is to large for her. I’m incredibly disappointed in the quality on hers. - the crown/stem is incredibly hard to pull out due to the lack of any lubrication on the setting lever or clutch wheel. You can feel it when pulling the crown to set the time, that is if you can even pull it out. It’s stuck in the watch and you have to pull with such force it will break the crown off or the stems internal components will wear prematurely. - the seconds hand doesn’t hit the markers which honestly is not a huge deal on a watch this price. It’s hit or miss for watches of any brand in this price range. - the hour hand is misaligned. This is a issue and not acceptable no matter the price of the watch, especially for Timex. I’m not happy at all and quite disappointed. Timex should be ashamed to sell a watch leaving the factory like this.
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Reviewed in the United States on August 23, 2024
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ruben r. leal
Lowell, US
★★★★★ 5
this is the perfect daily everyday use digital watch........
Color: Black
hands down the best edc digital watch available, this watch is everything you need at a quarter of the cost of other digital watches. we all know the durability of iron man watches its legendary, but where this watch beats even other iron man offerings is the size of the digital numbers displayed a bit larger for aging eyes and what makes it even more durable than the other iron man watch's is that the instructional labeling of the buttons is under the glass and wont fade or rub off under use making it look cleaner and newer for longer. now lets mention the size or foot print of this watch, i own several watches from competing brands and almost once a day i hit the watch on something a door knob a table corner, but when I'm wearing this Timex 40mm i never hit it on anything due to the thinness of the watch.
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Reviewed in the United States on May 11, 2025
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Robert E Bryant
Belleville, US
★★★★★ 5
The Best
Color: Black
Ironman watches are the best for everyday and the price is right!
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Reviewed in the United States on January 19, 2026
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Kindle Customer
Fort Morgan, US
★★★★★ 5
Works as expected
Color: Black
It's a Timex. Says it all...!
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Reviewed in the United States on February 15, 2026
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john w gardner jr
Chelsea, US
★★★★★ 5
Buy!
Color: Black/Negative
Great watch
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Reviewed in the United States on February 22, 2026

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