Pumice Stone - A Hidden Gem
When most people think of pumice, they picture the little grey stones used in beauty routines. But in the world of terrariums, vivariums, and bioactive builds, pumice is a hidden gem. It’s lightweight, porous, and packed with uses that make it a must-have for any hobbyist.
Why pumice works so well
Pumice is a volcanic rock that’s naturally full of tiny air pockets. These pores make it both light and absorbent. That means in a closed terrarium or vivarium:
- It aerates the soil, preventing compaction.
- It holds water without becoming soggy.
- It provides extra surface area for beneficial microbes to thrive.
This combination makes it especially handy when you’re building a healthy, self-sustaining environment for plants and inverts.
Uses in terrariums & enclosures
- Drainage layer: A bottom layer of pumice helps prevent stagnant water buildup and root rot.
- Soil additive: Mixing pumice into your substrate improves airflow and water distribution.
- Microfauna booster: Those tiny nooks give springtails and isopods more hiding spots and biofilm to graze on.
- Root support: For terrarium plants, pumice keeps roots strong while balancing moisture.
- Background alternative: Pumice is an excellent option instead of Drylok backgrounds. Its rough, porous texture makes it easy for mosses, vines, and epiphytes to grab hold and spread naturally, creating a more organic look without the extra sealing and curing time.
Where to get it
The nice part? You don’t have to hunt down landscaping suppliers or specialty stores. You can order pumice stone easily online. Here’s a reliable option on Amazon that I’ve personally used and recommend: