What Are Springtails? The Keeper's Complete Guide to Collembola and the Bioactive Cleanup Crew

Springtails are the most useful animal in my collection that I almost never actually see. They're a couple of millimeters long, they live down in the substrate, and most days the only sign of them is the absence of a problem — no fuzzy mold creeping across the leaf litter, no funk building up where a frog left a bit of waste, no white bloom on the cork bark. That invisible janitorial work is exactly why every serious bioactive vivarium I run has a thriving springtail culture working underneath it.

But "tiny cleanup bug" badly undersells what these animals actually are. Springtails are an ancient, globally abundant group of hexapods — not insects, despite what nearly every article online tells you — with a genuinely bizarre jumping organ, skin-breathing physiology, and an ecological job so fundamental that the soil under your feet partly exists because of them and their relatives. This is the complete explainer: what springtails really are at the level of biology and classification, how the famous spring mechanism works, what they eat and how they breed, the major types you'll meet in the hobby, why they show up uninvited in damp houses, and — the part most keepers care about — exactly how to use them as a living cleanup crew in a bioactive terrarium. Read it once, end to end, and you'll understand these animals better than 99% of the people keeping them.

What springtails actually are

Springtails are members of the class Collembola, a group of small, soft-bodied arthropods found on every continent on Earth, including Antarctica. They are among the most abundant animals on the planet — a single square meter of healthy forest floor or pasture soil can hold tens of thousands, sometimes more than a hundred thousand, individual springtails. You have almost certainly walked over millions of them today without noticing one.

They are hexapods, meaning six-legged arthropods, and that is the source of endless confusion. Because they have six legs and a small segmented body, springtails get called "insects" constantly, including in care articles that should know better. They are not insects. Insecta and Collembola are separate classes that both sit under the larger hexapod umbrella. They share a distant common ancestor, the way you share one with a lemur, but a springtail is no more an insect than a spider is. Getting this right isn't pedantry — the differences (no wings ever, skin-breathing, internal mouthparts) are exactly what make springtails behave and survive the way they do.

A few headline facts to anchor everything that follows:

• ◆Size. Most springtails run from about 0.25 to 6 mm long. The cleanup-crew species you'll buy are usually in the 1–3 mm range — visible if you look closely, easy to miss if you don't.
• ◆Age as a lineage. Collembola are ancient. Fossil springtails (Rhyniella praecursor, from the Rhynie chert) date to the early Devonian, roughly 400 million years ago, and they look startlingly like modern ones. They were among the first animals to colonize land, breaking down organic matter before there were forests, amphibians, or anything resembling soil as we know it.
• ◆Where they live. Moist places. Soil, leaf litter, under bark and stones, in rotting wood, in compost, among mosses, on the surface of ponds, even on snow. Anywhere there's dampness and decaying organic material.
• ◆What they do. They are decomposers (more precisely detritivores and fungivores). They eat dead and decaying matter, fungi, and microbes, and in doing so they recycle nutrients back into the soil. This is their entire ecological reason for being, and it's the same job we hire them to do in a vivarium.

If you remember nothing else: a springtail is a tiny, ancient, six-legged decomposer that lives in damp places, jumps with a spring-loaded tail, and breathes through its skin. Everything below is detail on those points.

The anatomy: built small, built for damp

Springtails have soft, segmented bodies divided into the standard arthropod three regions — head, thorax, and abdomen — but several features make them unmistakable once you know what to look for.

The cuticle. Their entire body is wrapped in a thin, often water-repellent (hydrophobic) cuticle. This waxy outer skin is what lets them live in saturated substrate and even ride on the surface film of water without getting wet or drowning. It's also their lifeline against drying out, which is why every springtail behavior tilts toward staying moist.

The eyes — or lack of them. On the head, springtails carry simple eyes called ocelli, clusters of up to eight pigment spots per side that detect light, shadow, and movement rather than forming detailed images. Many soil-dwelling species have fewer ocelli, and some deep-soil species have none at all — they're effectively blind and navigate entirely by touch and chemical cues. This is a sharp contrast with insects, which famously sport compound eyes.

The antennae. Short, segmented antennae sit on the head and do a lot of the sensory heavy lifting — sensing humidity, chemical trails, and the world immediately around them.

Entognathous mouthparts. Here's a true insect/non-insect divider. A springtail's mouthparts are internal — tucked inside a pouch in the head, a condition called entognathy. Insects are ectognathous: their mouthparts are external and exposed. The mouthparts themselves are simple, suited to scraping, chewing, and sucking up fungi, decaying matter, and microbes.

The collophore (ventral tube). On the underside of the first abdominal segment sits a small tube-like organ called the collophore or ventral tube — and "Collembola" literally means "glue peg," named after it. It handles water and ion regulation (springtails can absorb moisture through it) and helps with adhesion, letting them stick to smooth surfaces. It's a quietly critical organ for an animal that lives or dies by its water balance.

No tracheal system. Most insects breathe through a network of tubes (tracheae) opening at body pores called spiracles. Most springtails don't have this at all. They're small enough, with a high enough surface-area-to-volume ratio, that they respire directly through the cuticle — gas exchange straight across the skin. This is the deep reason springtails are chained to moist environments: skin-breathing only works when the skin stays damp, and a dried-out springtail suffocates as much as it desiccates.

And then there's the organ everyone comes for.

The furcula: how a springtail springs

The "spring" in springtail is a real, mechanical, spring-loaded structure called the furcula — a forked, tail-like appendage folded forward underneath the abdomen. At rest it's cocked and held under tension by a small clasp called the retinaculum (or tenaculum) on the underside of the body, like a loaded mousetrap held by a latch.

When the springtail is threatened — a shadow, a touch, a vibration — it releases the retinaculum. The furcula snaps down and back against the ground with sudden force, catapulting the animal up and away. A springtail can launch itself many times its own body length in a fraction of a second, vanishing before a predator can react. It's not aimed, controlled flight; it's an escape ejector seat. They land where they land, then scuttle off on their six legs.

It is one of the fastest movements relative to body size in the animal kingdom, and it's the entire reason for the common name. Worth knowing: not every springtail has a functional furcula. Many deep-soil species, living in tight spaces where there's nothing to jump away from, have a reduced furcula or have lost it entirely, relying on walking instead. The dramatic jumpers are mostly the surface-active species — including, conveniently, the ones you'll watch ping around the glass of a fresh vivarium.

This jumping is also the source of a persistent myth: that springtails are fleas. They are not. Fleas are true insects — hard-bodied, with piercing-sucking mouthparts, and parasitic, living off the blood of a host. Springtails are soft, harmless decomposers that happen to jump with a completely different mechanism (a fleas jumps with its legs; a springtail jumps with its tail). The resemblance is skin-deep and behavioral, nothing more.

Springtails vs. insects: the differences that matter

Because the "are they insects" question causes so much trouble, here's the comparison laid out plainly. Both are arthropods, both are hexapods, both have six legs — and that's roughly where the overlap ends.

That last row matters more than it looks. A young springtail hatches as a tiny version of the adult and simply gets bigger with each molt — there's no caterpillar-to-butterfly transformation, no nymph-to-adult restructuring. And uniquely, springtails keep molting throughout their entire lives, even after they're sexually mature and full-sized, which is genuinely rare among arthropods. A single springtail may molt fifty times or more over its life.

Habitat and distribution: where springtails actually live

Springtails are one of the most widely distributed animal groups on Earth, with over 9,000 described species and many more undescribed. The unifying thread across all of them is moisture — they go where it's damp and there's decaying organic matter to eat.

Soil and leaf litter are the heartland. The top few centimeters of soil, the layer of fallen leaves, the duff under a forest, garden compost, the rotting interior of a fallen log — these are springtail cities, packed with populations doing the slow work of breaking everything down.

Under cover. Lift a rock, a board, a piece of bark, or a flowerpot that's been sitting on damp ground, and you'll often see a scatter of tiny specks suddenly spring in every direction. Those are springtails, flushed out of their dark, humid hideout.

Domestic and urban spots. Indoors they turn up wherever it stays wet: the soil of overwatered houseplants, damp basements and crawl spaces, around plumbing leaks, near drains and air conditioners, in the grout of a perpetually steamy bathroom. They're not coming for your house — they're coming for the moisture and the mold the moisture grows.

Extreme habitats. Springtails are tough out of all proportion to their size. Some live on snowfields and glaciers, dark specks visible against the white, feeding on wind-blown algae and pollen — these are the original "snow fleas." Others endure deserts by hiding in microhabitats and shutting down metabolically through dry spells. Antarctic species survive being frozen solid by producing antifreeze compounds. There are even springtails adapted to salt marshes and seashores, tolerating salinity that would kill most soft-bodied animals. This adaptability is exactly why they've persisted, essentially unchanged, for 400 million years.

How springtails behave: movement, reproduction, and life cycle

Movement

Day to day, springtails walk — using their six legs to pick through substrate, leaf litter, and tight crevices in search of food. The dramatic furcula jump is reserved for emergencies: an escape reflex, not a commute. In a vivarium you'll mostly see them creeping slowly over damp glass or substrate, with the occasional one suddenly ping out of view when disturbed.

Reproduction

Springtail reproduction is indirect, and it's one of the more unusual things about them. Males don't mate with females directly. Instead, a male deposits tiny stalked packets of sperm — spermatophores — onto the substrate, sometimes dozens of them. Females wander through and collect a spermatophore to fertilize their eggs internally. Some species have elaborate courtship that improves the odds; others just blanket the area with spermatophores and let chance handle it. A number of species (notably Folsomia candida, the common cultured white springtail) reproduce parthenogenetically — females produce viable eggs with no males involved at all, which is part of why those cultures explode so reliably.

Once fertilized, females lay clusters of small, round eggs in damp substrate, leaf litter, or other protected, humid spots. Depending on temperature and humidity, eggs hatch in anywhere from a few days to a couple of weeks — warmer and damper is faster. The hatchlings are miniature adults and grow by molting repeatedly.

Life cycle and longevity

There's no metamorphosis to track. A springtail hatches small, molts its way up to full size over weeks, reaches maturity, and then keeps molting for the rest of its life. Individual lifespans vary by species and conditions but commonly run several months to a year or more. What matters for a keeper is the population rhythm: under good conditions (warm, moist, well-fed) a culture has overlapping generations constantly, and the colony can roughly double in a matter of weeks. That fast, continuous turnover is what makes them such a dependable, self-replenishing cleanup crew.

How they survive

Everything about springtail survival comes back to water balance. The hydrophobic cuticle, the moisture-absorbing collophore, the preference for damp microhabitats — it's all in service of staying hydrated enough to keep breathing through the skin. When conditions turn against them, many species can ride it out: entering a dormant, low-metabolism state to survive drought, producing cryoprotectant compounds like glycerol to survive freezing. Give them moisture and food and they thrive; take away the moisture and they either leave or shut down.

What springtails eat

Springtails are decomposers, and their menu is the reason they're so valuable both in nature and in a terrarium:

• ◆Fungi and mold — including the hyphae (mycelia) of molds and the spores. This is the headline item for keepers. Springtails graze mold down faster than it can spread.
• ◆Decaying plant matter — dead leaves, rotting wood, the general detritus of a forest floor or a leaf-litter layer.
• ◆Bacteria and microbes — they consume the microbial films that coat decaying surfaces.
• ◆Algae — including the algae that grows on damp surfaces, snow, and bark.
• ◆Animal waste and carrion — they'll break down small amounts of feces (like frog or gecko droppings) and the remains of dead invertebrates.

Critically, springtails do not eat living, healthy plants. They're not herbivores chewing your vivarium pothos; they target the dead and the decaying. Even in large numbers their activity is beneficial, not destructive — a key difference from actual plant pests. In a culture, keepers supplement that diet with small amounts of brewer's/baker's yeast, uncooked rice grains, a bit of mushroom, or a flake of fish food to keep the population booming.

Their role in the ecosystem: why springtails matter

Step back from the vivarium for a second, because the ecological story is what justifies everything we do with these animals. Springtails are one of the engines of the soil food web and a cornerstone of nutrient cycling.

When a leaf falls or a plant dies, that organic matter is locked up — its nitrogen, phosphorus, and carbon unavailable to living plants until something breaks it down. Springtails are part of the crew that does the breaking. By shredding decaying matter into smaller fragments and by grazing the fungi and bacteria that drive decomposition, they accelerate the conversion of dead material into humus — the dark, fertile organic component of healthy soil. The nutrients they help liberate become available again for plant roots. No decomposers, no nutrient cycle; no nutrient cycle, no thriving plants.

They do more than just eat:

• ◆Soil aeration. As they move through the substrate they create tiny channels, improving air and water movement and reducing compaction.
• ◆Fungal regulation. By grazing fungal growth, springtails help keep pathogenic fungi in check, including the molds that cause "damping off" in seedlings. They tilt the soil's microbial balance toward the beneficial.
• ◆Bioindication. Because springtails are sensitive to pollution, heavy metals, and moisture changes, scientists use their abundance and diversity as a measure of soil health. A thriving springtail community signals clean, well-functioning soil; a crashing one can flag contamination. Standardized springtail toxicity tests (using Folsomia candida) are a recognized tool in soil ecotoxicology.
• ◆Food web base. They're prey for mites, beetles, spiders, ants, small amphibians, and more — an intermediate link feeding the larger soil ecosystem.

If you want a primary, non-commercial deep dive on Collembola biology and ecology, the University of California Museum of Paleontology's overview of Collembola is a solid, accurate starting point, and university extension entomology departments publish reliable fact sheets on springtails as both soil organisms and occasional household visitors.

The deep evolutionary story

It's worth dwelling on just how old and how strange this lineage is, because it reframes what you're looking at when you watch a springtail ping across the glass. Collembola are among the earliest land animals known. The fossil Rhyniella praecursor, preserved in the Rhynie chert of Scotland, is roughly 400 million years old and already shows the recognizable springtail toolkit — segmented body, antennae, the apparatus for the furcula. That means springtails were established on land before there were forests, before amphibians crawled out of the water, before the great coal swamps, before the dinosaurs by something like 170 million years. They were among the pioneers turning bare mineral rock and primitive plant debris into the first real soils.

What's remarkable isn't just the age but the stability. Springtails preserved in amber tens of millions of years old look essentially like the ones in your garden right now. This evolutionary conservatism suggests their body plan — small, soft, skin-breathing, moisture-bound detritivore with an escape spring — hit on a formula so well-suited to life in damp soil and litter that there's been little pressure to change it. They found a niche near the very bottom of the terrestrial food web, doing a job that has never stopped being necessary, and they've simply kept doing it.

Their relationship to insects is also more interesting than the old textbooks said. Springtails did not descend from winged insect ancestors that later lost their wings — they branched off the hexapod line very early, before wings were ever invented. Modern genomic and phylogenetic work goes further, nesting hexapods (springtails included) deep within the crustaceans, so the cleanest modern statement is that a springtail is more closely related to a shrimp or a copepod than a casual observer would ever guess, and only distantly related to the beetles and flies it superficially resembles.

What science uses springtails for

Springtails aren't just hobby animals and soil bystanders — they're genuine workhorses of laboratory science, and a little of that context makes you a better keeper.

Soil ecotoxicology. Because Folsomia candida (the common white culture species) breeds quickly, reproduces parthenogenetically (so you get genetically uniform animals), and is sensitive to contaminants, it's a standardized test organism for soil toxicity. Internationally recognized protocols expose springtails to soil samples and measure survival and reproduction to assess whether a soil is contaminated with heavy metals, pesticides, or other pollutants. The same sensitivity that makes them a good lab subject is what makes wild springtail abundance a bioindicator of soil health in the field — lots of diverse springtails generally means clean, well-functioning soil.

Physiology and extreme survival. Cold-tolerant species are studied for their cryoprotectant chemistry — the glycerol and antifreeze proteins that let them survive freezing — with relevance to cryobiology. Desert and salt-tolerant species are studied for how they manage water and ion balance under stress.

Evolutionary and developmental biology. As an ancient, early-diverging hexapod lineage, springtails are a valuable comparison point for understanding how the arthropod body plan and the hexapod condition evolved.

For a keeper, the practical takeaway from all this is simple but real: springtails are a precision instrument for detecting bad conditions. If a robust springtail culture suddenly crashes for no obvious reason, suspect a contaminant — a treated plant, residue in a container, insecticide drift — before anything else. They'll fail before most of your other animals show symptoms, which makes a thriving culture a quiet early-warning system for the whole room.

The major types of springtails in the hobby

There are thousands of species, but in the bioactive and culturing hobby you'll mostly run into two practical categories, defined less by strict taxonomy than by how they behave and what they need.

Temperate "white" springtails

These are the workhorses — most commonly Folsomia candida, a small (1–2 mm), pale white-to-cream species that has been cultured in labs and hobby setups for decades.

• ◆Why keepers love them: they breed fast (often parthenogenetically, so a few founders become thousands), they tolerate a wide range of conditions including cooler room temperatures, and they're forgiving of beginner mistakes. They're excellent in both standalone cultures and as a vivarium cleanup crew.
• ◆Best for: general cleanup-crew duty, temperate and tropical vivariums alike, dart frog and gecko enclosures, and anyone keeping a backup culture going.
• ◆Trade-off: small and pale, so they're less visible — great for the job, less interesting to watch.

Tropical "pink" springtails

Sold under the trade name "pink springtails," this is a tropical Collembola species that runs a little larger and shows a faint pinkish-tan color.

• ◆Why keepers love them: bigger and more visible, so they're satisfying to watch and easy to confirm are thriving. Strong cleanup performers in warm setups.
• ◆Best for: tropical, consistently warm and humid vivariums — dart frog tanks especially.
• ◆Trade-off: they want steady warmth and high humidity and are less tolerant of a cool, dry room than the temperate whites.

There are other species in the trade too — larger "giant" or "silver" springtails, and various locally collected types — but for the overwhelming majority of keepers, the decision is simply temperate white for an easy, hardy default; tropical pink if you want bigger, more visible animals in a reliably warm tank. Many keepers run both.

Springtails as a bioactive cleanup crew — the practical heart of it

This is what most keepers actually want springtails for, so let's get concrete. A bioactive vivarium is a living enclosure where a community of small organisms — the "cleanup crew" or "microfauna" — continuously breaks down waste, controls mold, and keeps the substrate healthy, so you're not tearing the tank down to scrub it every few weeks. Springtails are the foundational member of that crew, usually paired with isopods (which handle larger debris) while the springtails handle mold and the fine stuff.

What springtails do in the tank

• ◆Mold control. When you set up a fresh vivarium full of cork bark, leaf litter, and damp substrate, mold will bloom in the first weeks — it's the new wood and organics breaking down. Springtails graze that mold relentlessly, and in a well-seeded tank the blooms recede and stop coming back. This alone sells most keepers on them.
• ◆Waste breakdown. Frog, gecko, and other animal droppings; dead feeder insects; shed skin; fallen leaves — springtails work it all down, keeping the substrate from souring.
• ◆Substrate health. Their constant activity keeps the soil layer biologically active and balanced, supporting the live plants and the larger ecosystem.
• ◆A live, gut-loaded snack. In dart frog and small amphibian tanks, springtails reproduce fast enough that they double as a supplemental food source — froglets and tiny animals hunt them straight out of the substrate.

Seeding a vivarium

Seeding is genuinely easy:

1. ◆Get a culture. One starter culture — typically a few hundred to a thousand animals living in a tub of charcoal or substrate — is enough to seed a standard 10-to-20-gallon enclosure. When you want a reliable, well-started culture, All Angles Creatures stocks healthy springtail cultures ready to pour straight into a tank.
2. ◆Pour the whole thing in. Don't try to separate the animals from their substrate — that substrate is full of eggs and juveniles. Tip the entire culture, charcoal and all, onto the vivarium substrate and leaf litter. If your culture is on charcoal, you can flood it with a little water and pour off the floating springtails, but dumping the whole culture works fine.
3. ◆Give it leaf litter and moisture. A layer of dried leaf litter (magnolia, oak, almond) gives springtails cover, food, and breeding habitat. Keep the substrate damp but not waterlogged.
4. ◆Wait. It takes a few weeks for the population to establish and multiply to the point where you'll see them on the glass at night or when you mist. Resist the urge to "check" by digging — just keep it moist and let them work.

Keeping a backup culture

I always keep at least one standalone springtail culture going on a shelf, separate from any tank, for three reasons: it's an insurance policy if a vivarium crashes, it's a free source of feeders, and it's a top-up supply when I set up a new tank. A culture is trivially simple:

• ◆Container: any ventilated plastic tub with a lid.
• ◆Medium: the classic is horticultural charcoal topped with water (springtails live on the surface and you can pour them off to harvest), but moist coco fiber or a thin organic substrate works just as well.
• ◆Moisture: keep it damp — a few millimeters of standing water under charcoal, or consistently moist substrate. Springtails need it humid.
• ◆Food: a small pinch of brewer's or baker's yeast, a few uncooked rice grains, a sliver of mushroom, or a flake of fish food every week or so. Remove anything that molds heavily before the springtails clear it (a little mold is fine — it's food — but a runaway bloom on un-grazed food can sour the culture).
• ◆Temperature: room temperature works for white springtails; keep tropical types warmer.

Harvest by tapping the culture wall to dislodge springtails into the tank, or by flooding charcoal and pouring off the floaters. Refresh or split the culture every few months before it gets tired.

Common cleanup-crew mistakes

• ◆Too dry. The number-one killer. Springtails need persistent moisture; a culture or tank that dries out will crash. Keep it damp.
• ◆Letting food mold over. Overfeeding a culture so that food molds faster than the springtails can graze it fouls the medium. Feed small amounts.
• ◆Expecting instant results. A freshly seeded tank takes weeks to build a working population. Patience.
• ◆No leaf litter or cover. Springtails need humid hiding and breeding habitat. Bare substrate supports far fewer than a leaf-littered one.
• ◆Pesticide contamination. Springtails are extremely sensitive to insecticides and many plant treatments. Never introduce treated plants, and never use bug spray near a bioactive tank.

"Help, springtails are in my house" — what's really going on

Plenty of people meet springtails not in a vivarium but as a sudden swarm of tiny jumping specks in a damp bathroom, a basement, a kitchen sink, or the soil of a houseplant — and they panic. Here's the honest picture: springtails indoors are a moisture flag, not an infestation, and they're harmless.

• ◆They don't bite, sting, or carry disease. They have no mouthparts capable of hurting you.
• ◆They don't damage anything. Not wood, not food, not fabric, not your house's structure. They're not termites and not ants; they eat mold and decaying matter, not your stuff.
• ◆They're telling you something useful. Springtails congregate where it's persistently wet. Their sudden appearance usually means there's a moisture problem — an overwatered plant, a slow leak, condensation, poor ventilation, dampness behind a wall — and where there's chronic damp, there's often mold, which is the actual thing worth caring about.

The fix is never really about killing springtails — it's about removing the moisture they came for:

• ◆Let overwatered houseplant soil dry out between waterings, and improve pot drainage.
• ◆Repair leaky pipes, faucets, and appliances.
• ◆Run exhaust fans or a dehumidifier in damp bathrooms, basements, and crawl spaces.
• ◆Eliminate standing water in sink traps, plant saucers, and drains.
• ◆Improve ventilation and seal gaps where they wander in from outside.

Do that and the springtails leave on their own, because the conditions that drew them are gone. Spraying insecticide at them treats the symptom and ignores the leak. If you only take one thing from this section: a springtail in the house is a smoke detector, not a fire. (For a deeper walkthrough of the indoor situation, see my companion guide below.)

Fascinating springtail facts

• ◆They predate the dinosaurs by ~170 million years. The 400-million-year-old fossil record makes Collembola one of the oldest hexapod lineages, essentially unchanged in body plan.
• ◆They might be closer to crustaceans than to insects. Modern genomic work places hexapods (including springtails) as deeply nested within the crustacean tree, so in a real sense a springtail is a closer relative of a shrimp than people assume.
• ◆Snow fleas are antifreeze chemists. Cold-tolerant springtails produce specialized antifreeze proteins; some Antarctic species survive being chilled far below freezing.
• ◆They jump with a tail, not legs. The furcula is mechanically unrelated to how a flea or grasshopper jumps — it's a latch-and-release lever unique to this group.
• ◆They never stop molting. Continuing to molt as an adult is rare among arthropods and ties into their continuous lifelong growth and regeneration.
• ◆They're a global census nightmare and a soil-health gift. With 9,000+ described species and dizzying local densities, they're one of the most abundant and ecologically important animal groups almost nobody thinks about.

The short version

Springtails are tiny hexapods of the class Collembola — emphatically not insects — that breathe through their skin, jump with a spring-loaded tail called the furcula, and make their living as ancient, globally abundant decomposers eating mold, fungi, algae, and decaying matter in damp habitats. They're completely harmless to humans and animals: no bites, no stings, no damage. In nature they're a cornerstone of soil health and nutrient cycling; indoors they're a harmless flag that something is too wet; and in the hobby they're the foundational bioactive cleanup crew, grazing down mold and breaking down waste so a vivarium can run itself. Pick temperate white springtails for an easy, hardy default or tropical pink for bigger, more visible animals in a warm tank, keep them damp and lightly fed, seed your enclosure with a full culture, and let one of the planet's oldest and most useful little animals do the quiet work underneath everything else.

Going deeper on springtails? See my complete guide to springtail behavior, diet, and more, and if they've turned up uninvited, are springtails invading your home? here's what to do. Or browse the full exotic animal care library for the rest of the bioactive cleanup crew.