Written by the team at Creature Cache, based on firsthand breeding and bioactive setup experience in Southern California. Updated 2026.
A bioactive terrarium built around an isopod colony is one of the best ways to enjoy these animals. The isopods break down waste, eat mold, cycle nutrients through the substrate, and keep the enclosure clean with minimal effort from you. But not every species fits every setup. The right choice depends on the humidity you can hold, how much airflow you can give, and whether you want a colony you can actually see.
One rule first: our isopods are pets, and they do best in an enclosure of their own. We recommend keeping each species by itself rather than mixing it with other animals or other isopods.
At Creature Cache we only work with exotic species, so this guide covers the isopods we keep ourselves and have watched do well in planted setups.
Quick Reference: Best Species by Setup Type
- Humid planted terrariums: Rubber Ducky or Cherry Blossom (Cubaris sp.). Humidity 70 to 80 percent with a drier side.
- Big, impressive Cubaris: Lemon Blue or Crabby (Cubaris sp.). Crabbies hide a lot, so pick Lemon Blues if you want to see them more.
- Color and activity: Ember Bee or Scarlet (Ardentiella sp.). Higher ventilation, drier gradient, climbing structure.
- Collector displays: Durian Spiky, Lemon Spiky (Laureola sp.), or Qilin.
- Every setup: Tropical Pink springtails as the working cleanup crew.
Rubber Ducky Isopods (Cubaris sp.)
Best for: Humid planted terrariums and anyone building their first bioactive setup with an exotic species.
Rubber Duckies are the most popular Cubaris in the hobby for good reason. They handle high humidity well, and the duck bill face makes them fun to spot at night. They are slow to moderate breeders, so pair them with springtails to handle mold and waste while the colony builds. Rubber Ducky care guide.
Cherry Blossom Isopods (Cubaris sp.)
Best for: Planted terrariums where you want color.
Cherry Blossoms are one of the few exotic species we recommend to beginners. They settle in well, breed at a moderate pace, and their pink and cream coloration develops as they mature. Cherry Blossom care guide.
Lemon Blue and Crabby Isopods (Cubaris sp.)
Best for: Larger planted display terrariums where size and presence matter.
These are two of the largest Cubaris in the hobby, with Crabby adults reaching close to 3 cm. Lemon Blues breed at a moderate pace and come out at night to work the leaf litter. Crabbies are slow breeders and spend most of their time hidden, so they suit keepers who want the biggest Cubaris more than a busy display. Lemon Blue care guide and Crabby care guide.
Ember Bee and Scarlet Isopods (Ardentiella sp.)
Best for: Well ventilated display terrariums with plenty of climbing structure.
Ardentiella are the opposite of a hide in the dirt cleanup crew. Ember Bees and Scarlets climb, sit in the open, and show off. They want more airflow and a drier gradient than Cubaris, and they mature in about 5 to 7 months. Ember Bee care guide and Scarlet care guide.
Durian Spiky and Lemon Spiky Isopods (Laureola sp.)
Best for: Collector displays.
Durian Spikies are small, armored, and shy. Lemon Spikies are bright yellow, a little larger, and live on bark, moss, and leaf cover rather than burrowing. They will process some waste, but their real job is being the rarest thing in the room. Durian Spiky care guide and Lemon Spiky care guide.
Qilin Isopods
Best for: A crown jewel display.
The Qilin is one of the rarest isopods in the US hobby, spiky and covered in fine hairs. They are fairly easy to care for, much like a Rubber Ducky setup kept a little less wet. Qilin care guide.
Always Add Springtails
No matter which isopod you choose, add a Tropical Pink springtail culture. Springtails are the fastest mold and waste processors in the enclosure and they reproduce quickly enough to keep up with an established setup. We run them in every one of our own colonies. Tropical Pink springtail care guide.
Pair Your Colony With the Right Substrate
Isopods need a substrate with organic matter they can eat. We use a modified ABG mix for all of our colonies: 12 quarts sphagnum moss, 6 quarts coco coir, 4 quarts orchid bark, 2 quarts charcoal, and 2 quarts worm castings. Top it with a thick layer of hardwood leaf litter, add decaying hardwood, and include cuttlebone for calcium. See our full ABG Substrate Guide for the complete recipe.
Where to Buy Bioactive Isopods
All of our isopods and springtail cultures are captive bred and ship FedEx Priority Overnight with a 100% live arrival guarantee.
Browse all isopods or shop springtail cultures. Join the Creature Club for 10% off your first order.
Common Questions About Bioactive Isopods
What are the best isopods for a bioactive terrarium? For humid planted terrariums, Cubaris species like Rubber Ducky and Cherry Blossom. For well ventilated displays, Ardentiella like Ember Bee. Always pair them with springtails.
Can I mix different isopod species? We recommend keeping each species in its own enclosure.
Do isopods eat waste? Yes. Isopods are detritivores that break down decaying organic matter, though exotic species work more slowly than a mass of springtails. Run both.
How long does it take for isopods to establish in a bioactive setup? Give them 4 to 8 weeks to acclimate. Cubaris species will show visible growth within a few months. Slower species take longer, which is why we recommend starting with a group of 10 or more.
How many isopods do I need? A starter group of 6 to 10 is enough to seed a 20 to 40 gallon enclosure alongside a springtail culture. Larger setups or faster results call for a breeding group of 10 or a colony of 20.