Yes — springtails do eat biofilm. Biofilm is the thin layer of microbes and organic material that builds up on damp surfaces, and springtails graze it as part of a broader diet. It helps support a colony, but it does not replace proper feeding or husbandry.
For background on what springtails are breaking down in a setup, see What Do Springtails Actually Clean Up?. If you want the wider enclosure context, Springtails for Bioactive Enclosures is a useful next step. You can also read Do Springtails Eat Waste? and browse our wider Springtail Bioactive Guides.
What biofilm means for springtails
Biofilm is a thin, often invisible layer of microbes, bacteria and fine organic material that forms on moist surfaces. Springtails browse it as they move through leaf litter, moss, wood and substrate.
That makes biofilm a useful part of springtail keeping, especially in damp, organic setups where it develops naturally. It supports grazing, but it is not a complete food source on its own and springtails will not remove it entirely.
What springtails eat besides biofilm
Most commonly kept springtails are generalist feeders. They also graze:
- fungi and fungal hyphae
- bacteria-rich surface growth
- fine decaying organic matter
- leaf litter surfaces
- other naturally developing organic resources
This is why springtails do well in bioactive systems: the enclosure itself keeps producing the kind of small-scale food they use. Species still matter, though, and specialist springtails may need different feeding approaches.
A practical feeding routine
For cultures: offer a very small amount of suitable food, then wait until most of it has been eaten before adding more. If food is still sitting there at the next check, hold back and feed less often.
For bioactive enclosures: feed only lightly, and only when the colony is clearly using what is already present. Established setups usually get much of their food from biofilm, fungi and decaying organic matter, so extra feeding is mainly for new setups, recovering populations or times when the colony needs a small boost.
In both cases, the best guide is consumption. If the food disappears quickly and the springtails stay active, a small top-up may be useful. If food lingers, stop adding more until the colony catches up.
When to feed more, and when to hold back
Increase feeding if the colony is active and clearing food quickly, especially in a young culture that is still building numbers.
Hold back if food is lingering, if mould is spreading faster than expected, or if the enclosure is becoming stale or untidy. Those are signs to reduce feeding and let the system settle.
If springtails are not thriving, the answer is not always more food. A culture or enclosure that is too dry, too wet or poorly balanced may need attention before feeding changes will help.
Common feeding mistakes
The most common mistake is overfeeding. Springtails are small, so it is easy to add more than they can use, especially in humid setups where leftovers break down quickly.
Another mistake is relying on a fixed schedule instead of watching the colony. A warm, growing culture will eat differently from a cool, small one.
For specialist species, use species-specific guidance where available, as not every springtail feeds the same way.
For most keepers, the simplest approach works best: let the enclosure provide as much as it can, add only small supplementary feeds, and adjust based on what the springtails actually do. Biofilm is useful, but it is support for the colony, not a substitute for feeding or husbandry.