Can crested geckos eat springtails?

Not in any meaningful way. Springtails are 1–2 mm — far too small to be a real meal even for a crested gecko, and certainly not a protein source you can rely on. They're a bioactive cleanup organism, not a feeder. Use discoid roaches as the protein insect and a complete crested gecko diet (CGD) as the staple.

What do springtails do in a crested gecko enclosure?

In a bioactive, planted crestie enclosure, springtails (Collembola) live in the substrate and eat mold, fungus, and decaying matter, helping keep the soil balanced and mold-free in the humid conditions crested geckos need. They benefit the habitat, not the gecko's diet.

Do discoid roaches have a good calcium-to-phosphorus ratio?

No. Discoids are phosphorus-heavy like nearly all feeder insects and must be dusted with calcium before feeding. Their strength is protein. Don't skip the calcium dusting on the assumption they're naturally balanced — they aren't.

Do crested geckos even need feeder insects?

Not strictly. A complete crested gecko diet (CGD) can carry an adult crestie alone. Insects like discoid roaches add protein and enrichment and are most valuable for hatchlings and breeding females, offered once or twice a week as a supplement, not a replacement for CGD.

Should I run both springtails and discoid roaches?

In a bioactive crestie setup, yes. Springtails live in the substrate as cleanup crew while you offer gut-loaded, calcium-dusted discoid roaches as the protein supplement. They do completely different jobs, so using both is the ideal.

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Geckos

Discoid Roaches or Springtails for Crested Geckos? One Feeds, One Cleans

By Matt Goren · Updated June 25, 2026

I keep getting asked to settle "discoid roaches or springtails for crested geckos," and I have to gently reframe the question every time, because these two organisms aren't doing the same job. One actually feeds your gecko. The other keeps the gecko's enclosure clean. Picking between them as if they're competing feeders leaves you with either an underfed crestie or a moldy tank. Here's how each really fits into crested gecko care.

How crested geckos actually eat

Crested geckos (Correlophus ciliatus) are arboreal frugivores from New Caledonia — they eat fruit, nectar, and small insects in the wild. In captivity, the smart foundation is a complete powdered crested gecko diet (CGD), which is formulated with the right protein, calcium, and vitamins and can carry an adult crestie on its own.

That makes insects a supplement — extra protein and enrichment, most important for fast-growing hatchlings and breeding females, offered once or twice a week. So the real question isn't "which feeder replaces CGD," it's "what do I add on top of CGD, and what keeps the humid bioactive enclosure healthy." Discoids answer the first; springtails answer the second. The Merck Veterinary Manual on reptile nutrition is a solid non-commercial reference on why that protein and calcium balance matters.

Discoid roaches: the protein supplement

Discoid roaches (Blaberus discoidalis) are the insect I add to a crested gecko's diet once it's past the tiny hatchling stage. They run roughly 18–23% protein with moderate fat and high moisture, and they're soft-bodied and low in chitin — easy for a toothless crestie to handle and digest. They come in sizes from small nymphs up, so you can match them to the gecko.

What makes them so practical as a gecko feeder:

They can't climb smooth surfaces and don't fly, so they stay in a smooth feeding dish until the gecko gets them.
They move at a slow, deliberate pace that triggers a crestie's stalk-and-pounce response.
They gut-load extremely well — feed the roaches well for a day or two and that nutrition passes to your gecko.

The one correction worth repeating: discoids are not naturally calcium-rich. They're phosphorus-heavy like nearly all feeders, so you dust them with calcium before feeding. When I restock, I buy nymphs sized to my geckos from All Angles Creatures' discoid roach collection.

Springtails: the cleanup crew

Springtails (Collembola) are tiny — 1 to 2 millimeters. They're not really a feeder for crested geckos; they're a bioactive cleanup organism. In a planted, humid crestie enclosure (exactly the kind of environment crested geckos thrive in), springtails live in the substrate and eat mold, fungus, and decaying plant matter, helping keep the soil balanced and preventing the mold blooms that high humidity invites. They reproduce fast and quietly do their maintenance work.

What they can't do is feed your gecko. A 1.5 mm springtail isn't a meal — a crested gecko won't make a dent in its protein needs grazing on them, and won't reliably hunt them at all. The place springtails genuinely serve as food is with truly tiny animals like dart frogs. For a crested gecko, keep them firmly in the "habitat maintenance" column.

Side by side

Factor	Discoid roaches	Springtails
Size	Nymph to 2" adult	1–2 mm
Role	Protein supplement (with CGD)	Bioactive cleanup crew
Feeds a crestie?	Yes	No — far too small
Protein to the gecko	High (~18–23%)	Negligible
Job in the enclosure	The meal	Eats mold and decay in substrate
Need to dust with calcium	Yes	N/A (not a feeder)

How I use both in a crestie setup

For a bioactive crested gecko enclosure, this isn't an either/or — it's a both/and:

CGD is the staple, always available and refreshed every day or two.
Discoid roaches are the protein supplement — 2–4 nymphs sized to no longer than the space between the gecko's eyes, gut-loaded and calcium-dusted, once or twice a week.
Springtails live in the substrate as cleanup crew, keeping the humid enclosure mold-free alongside isopods.

If you're not running bioactive and just want to know what to feed, it's straightforward: discoid roaches are your protein insect, and springtails aren't something you need to feed at all.

Bottom line

"Discoid roaches or springtails" is a false choice for a crested gecko. Springtails clean the enclosure; discoid roaches feed the gecko. Build the diet on CGD, add gut-loaded and calcium-dusted discoid nymphs as the protein supplement, and let springtails do their janitorial work in the substrate of a bioactive setup. One nourishes; one maintains. You want both.

Building out a bioactive crestie enclosure? See discoid roaches vs. isopods for crested geckos, the flour beetle larvae vs. discoid roaches breakdown, or the full feeder insect care library.

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