Whether you’re keeping isopods, praying mantis, stick insects, or jumping spiders, the substrate you choose can make or break your invertebrate enclosure. With our growing range of 3D-printed vivariums, we’ve learned a thing or two about what works best for various species and setups.
What Is Substrate and Why Does It Matter?
Substrate is the base layer that lines the floor of your enclosure. It serves many purposes:
- Maintains humidity
- Provides burrowing space
- Supports beneficial microfauna
- Absorbs waste and moisture
Getting it right is essential — especially in high-humidity environments or if you’re using a sealed or semi-sealed vivarium.
Best Substrates by Invertebrate Type
Isopods
Isopods thrive in moist, organic-rich substrate. A mix of the following works great:
- Leaf litter
- Decayed wood
- Coco fibre or soil base
- Crushed limestone (for calcium)
They also benefit from the addition of springtails, which reduce mould and clean up detritus. We recommend adding a springtail riser nearby if you’re culturing your own.
Praying Mantis
Mantis enclosures are usually dry or lightly misted. Use:
- Paper towel or dry coco fibre for hatchlings
- Loose coco fibre or forest soil for nymphs/adults
Avoid overly moist substrates, which can encourage mould and fungal issues — especially in closed systems.
Stick Insects
Stick insects drop frass and uneaten leaves, so a simple base layer is usually enough:
- Newspaper or kitchen roll for easy cleanup
- Coco fibre with drainage if humidity is required
Watch for mouldy food plants like bramble — springtails can help reduce this too!
Spiders (e.g. Jumping Spiders)
Jumpers prefer dry or very lightly misted setups. Use:
- Dry topsoil or sandy loam
- Small cork bark or climbing features
Ventilation is key. Many of our 3D-printed enclosures have built-in venting ideal for these species.
Humidity and Drainage Tips
If your species needs moderate to high humidity, consider layering your substrate:
- Start with a base of hydro balls or LECA
- Add a mesh separator
- Top with organic-rich substrate
This prevents waterlogging and encourages root growth if you’re using live plants like Pothos or Syngonium rayi.
Substrate Depth and Spot Cleaning
Don’t overpack the enclosure. Most inverts don’t need deep substrate unless they burrow. Stick to:
- 1–2 cm for mantis or spiders
- 3–5 cm for isopods or burrowers
Spot clean weekly and replace sections as needed — this keeps microfauna balanced and odours down.
Pair with the Right Enclosure
Our line of 3D-printed vivariums offers built-in ventilation, rot-proof structure, and custom size options. Ideal for invertebrate setups — whether you’re breeding or just displaying your favourite critters.
Final Thoughts
Choosing the right substrate ensures the health of your inverts and simplifies your care routine. With the right enclosure and a solid substrate plan, you’ll be able to maintain stable humidity, reduce pests, and enjoy cleaner, healthier environments.
Check out our full range of enclosures and accessories to get started right.
