




🌿 Elevate your terrarium game with volcanic vitality — because your reptiles deserve the best habitat!
Exo Terra Sub Stratum is a 4.4 lb bioactive volcanic substrate crafted from mineral-rich tephra of Japan’s Aso Volcano. Its porous, lightweight composition promotes excellent drainage, moisture retention, and supports beneficial microorganisms that naturally eliminate odors and ammonia. Ideal for planted reptile terrariums, it fosters a clean, healthy, and vibrant ecosystem for reptiles and plants alike.












| ASIN | B091L3FS7X |
| ASIN | B091L3FS7X |
| Age Range Description | All Life Stages |
| Best Sellers Rank | #58,288 in Pet Supplies ( See Top 100 in Pet Supplies ) #137 in Terrarium Substrate |
| Brand Name | Exo Terra |
| Color | Brown |
| Customer Reviews | 4.7 4.7 out of 5 stars (199) |
| Date First Available | October 8, 2021 |
| Date First Available | October 8, 2021 |
| Directions | Follow individual packaging instructions. |
| Included Components | All items listed in description. |
| Item Dimensions LxWxH | 6.3 x 2.36 x 10.24 inches |
| Item Package Dimensions L x W x H | 10.94 x 6.65 x 2.28 inches |
| Item Weight | 4.38 pounds |
| Item model number | PT3183 |
| Item model number | PT3183 |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| Model Name | ET Bioctive Volcanic Substrate 4.4lb |
| Number of Items | 1 |
| Product Dimensions | 6.3 x 2.36 x 10.24 inches; 4.39 Pounds |
| Size | 4 LBS |
| Specific Uses for Product | Indoor |
| Target Audience Keyword | Amphibians, Reptiles |
K**L
very good
The Exo Terra Sub Stratum is an excellent choice for reptile enthusiasts looking to create a natural and enriched habitat for their terrarium inhabitants. With its bioactive composition, moisture-retention properties, and support for plant growth, this substrate enhances the well-being of reptiles while adding visual appeal to the terrarium. Although it may be slightly more expensive, the benefits it provides make it a worthwhile investment for serious reptile keepers. Rating: 4.7/5 Overall, I highly recommend the Exo Terra Sub Stratum for anyone seeking to create a thriving and visually stunning terrarium environment for their reptiles.
S**F
Great for enclosures and such!
Good product works perfect for enclosures with live plants and would defenitely recommend getting more than one bag for bigger enclosures!
W**G
great rooting medium
This stuff has been great for rooting some of my more resistant cuttings. I have a woody umbrella plant that is always giving me trouble but this media has worked well so far to root cuttings. Everything else I drop in her roots perfectly, every time so far
E**Y
Great Price, Great Quality
My plants are so happy in this and it keeps my springtails hopping! Keep a bag of it on hand at all times now. Very clean as well. I am confident when using this product that I won’t contaminate with other biomaterials or some kind of harsh chemicals.
K**R
Good
Worked well, stained surfaces though.
A**9
Great addition to biodiversity
When dealing micro fauna and small rare plants. This is a must! My isopods and small plants love this stuff. I use it whenever adding rich nutrients to my setups.
V**E
Used as plant substrate
Works great for rooting cuttings and rehabbing struggling plants!
P**7
Its ok.
Im giving this a 3 not because it was bad, but because you can def notice the difference when proping plants. The ones in fluval def grow faster and stronger. So it first go to waste I mixed this into my fluval to make it go further, and also put some in my chunky soil for aeration.
J**A
Used this for substrate in my plants and succulents. I’m currently sprouting some echeveria in the stratum.
M**S
j'ai acheter ce substrat suite au conseils de mon fleuriste pour une plante que j'ai acheter dans les iles canaris. je suis ravis du résultat, la plante et plus belle après 4 semaines. je conseil vivement.
M**N
Works amazingly for my soil in my tank. Good value for money
G**H
Un tres beau substrat qui fait son job je m'en sers comme drain sous une fibre de coco et ça fait très bien son taf je recommande ! Très bonne qualité.
C**N
Parfait , pousse très bien, je mélange avec de la perlite
Trustpilot
1 month ago
1 month ago