Everything you need to know about keeping isopods and springtails and using them in bioactive terrariums.
What are isopods?
Isopods are small terrestrial crustaceans that naturally live in moist environments and feed on decaying organic material. In terrariums, they are commonly used as part of a bioactive cleanup crew.
What are springtails?
Springtails are tiny soil-dwelling organisms that thrive in moist environments. They feed on mold, fungi, and decomposing organic matter, making them especially useful in terrariums and bioactive enclosures.
What is a bioactive cleanup crew?
A cleanup crew is a community of small organisms—most commonly isopods and springtails—that helps break down waste and organic material in a bioactive enclosure. They work alongside plants, microorganisms, and the substrate to create a more natural ecosystem.
What's the difference between isopods and springtails?
Isopods primarily consume decaying leaves, wood, and other organic material, while springtails are particularly useful for consuming mold and fungi. Because they perform different roles, they are often kept together.
Can isopods and springtails live together?
Yes. Isopods and springtails are commonly kept together and complement one another well in bioactive terrariums.
Do I need both isopods and springtails?
You don't necessarily need both, but using them together can create a more complete cleanup crew. Isopods handle larger decomposing material while springtails help control mold and break down smaller organic matter.
What do isopods eat?
A good isopod diet starts with plenty of decaying leaf litter and wood. Depending on the species, supplemental foods can include vegetables, specialized isopod foods, and protein sources. A calcium source is also commonly provided.
What do springtails eat?
Springtails primarily consume fungi, mold, microorganisms, and decomposing organic material. Established bioactive environments often provide much of what they need naturally.
Do isopods need leaf litter?
Yes. Leaf litter provides food, shelter, moisture retention, and habitat. Oak, magnolia, and other appropriate dried leaves are commonly used. Maintaining a layer of leaf litter is one of the most important parts of an isopod enclosure.
Why is cork bark used with isopods?
Cork bark provides shelter and creates a humid microclimate underneath it. Isopods frequently congregate beneath cork bark because it offers darkness, protection, and access to moisture.
Do isopods need calcium?
Isopods use calcium to support their exoskeletons. Many keepers provide a supplemental calcium source such as cuttlebone, limestone, or another appropriate calcium-rich material.
How moist should an isopod enclosure be?
Moisture requirements vary by species. A common approach is to maintain a moisture gradient, with one portion of the enclosure kept moist and another allowed to remain comparatively dry. This lets the isopods move to the conditions they prefer.
Do springtails need moisture?
Yes. Springtails generally thrive in moist, humid environments. If their environment becomes excessively dry, the colony may decline.
Do isopods need ventilation?
Yes. Isopods need adequate airflow along with appropriate humidity. The ideal balance between ventilation and moisture depends on the species being kept.
Will springtails get rid of mold?
Springtails feed on many molds and fungi and can help keep minor mold growth under control. They aren't a substitute for correcting excessive moisture, poor ventilation, or other conditions causing persistent mold problems.
How quickly do isopods reproduce?
It depends heavily on the species, temperature, food availability, moisture, and maturity of the colony. Some species reproduce relatively quickly, while others can take considerably longer to establish.
How quickly do springtails reproduce?
Under favorable conditions, springtail populations can increase rapidly. Adequate moisture, food, and suitable temperatures help support a healthy colony.
Can I put isopods directly into my terrarium?
Usually, but first make sure the species you've selected is appropriate for the enclosure's temperature, humidity, substrate, and inhabitants. Providing leaf litter, hiding places, moisture, and food sources will help the colony establish.
How many isopods should I add to a terrarium?
There isn't one number that works for every enclosure. The appropriate starter population depends on enclosure size, isopod species, available habitat, and how quickly you want the colony to establish.
How many springtails should I add?
You generally don't need to count individual springtails. A portion of an established culture can be introduced into suitable substrate, where the population can reproduce if conditions are favorable.
Will isopods escape my terrarium?
Isopods generally remain where suitable moisture, shelter, and food are available, but they can occasionally wander. A properly designed enclosure helps reduce escapes.
Are isopods safe with reptiles and amphibians?
Many isopod species are widely used in reptile and amphibian bioactive enclosures. However, compatibility depends on both the isopod species and the animal being housed. Research the requirements of your specific animal before introducing a cleanup crew.
Can my reptile or amphibian eat the isopods?
Some reptiles and amphibians will eat isopods they encounter. This is natural behavior, but heavy predation can make it difficult for an isopod colony to become established.
Why are my isopods hiding?
Hiding is normal isopod behavior. They commonly gather beneath cork bark, leaves, wood, and other dark, moist areas, particularly during the day.
Why aren't my isopods reproducing?
Possible causes include incorrect moisture levels, unsuitable temperatures, insufficient nutrition, overcrowding, inadequate hiding places, or simply not enough time. Reproductive rates also vary considerably between species.
Why did my springtail population disappear?
The enclosure may have become too dry, food may have become limited, or environmental conditions may have changed. In a terrarium, springtails may also still be present in the substrate even when you don't see many on the surface.
Can I keep isopods as pets instead of using them in a terrarium?
Absolutely. Many people maintain dedicated isopod colonies simply because they enjoy collecting, observing, and breeding different species and varieties.
What should a basic isopod setup include?
A good starter enclosure generally includes appropriate substrate, plenty of leaf litter, decaying wood, cork bark or another hiding area, a calcium source, ventilation, and a reliable moisture gradient. Exact requirements vary by species.
Are all isopods cared for the same way?
No. Different species can have significantly different requirements for moisture, ventilation, temperature, diet, and substrate. Always research the particular species you're purchasing.
Can isopods and springtails replace terrarium cleaning?
No. A cleanup crew can help process organic waste, mold, and decomposing material, but bioactive doesn't mean maintenance-free. You should still monitor the enclosure, remove excessive waste or uneaten food when necessary, maintain proper environmental conditions, and care for the enclosure's primary inhabitants.
What's the best way to get started?
Choose isopods suited to the environment you plan to maintain, add springtails, and provide a quality substrate with plenty of leaf litter, cork bark, moisture, and other appropriate natural materials. Give the cleanup crew time to establish and regularly monitor conditions.
Important: Care requirements and animal compatibility vary by species. Information provided here is general guidance and should not replace species-specific research.