Aquarium plant

Azolla Fairy Moss

Azolla Fairy Moss (Azolla filiculoides) aquarium plant care.

Azolla Fairy Moss TL;DR

Light: medium · CO2: no · Difficulty: beginner.

Azolla Fairy Moss (Azolla filiculoides) is a popular aquarium plant.

What lighting does Azolla Fairy Moss need?

Target medium lighting. PAR: 30-60.

Is CO2 required for Azolla Fairy Moss?

No CO2 required.

What substrate and nutrients does Azolla Fairy Moss need?

Tolerates inert substrate with occasional root tabs.

How is Azolla Fairy Moss propagated?

Splits via runners.

Where to buy

Browse Azolla Fairy Moss from vetted Fast Aquatics plant vendors.

Azolla Fairy Moss FAQ

How much light does Azolla Fairy Moss need?

Azolla Fairy Moss is rated as a medium-light plant, with a target of about PAR 30-60 at the leaves. Medium light is roughly what a mid-range planted-tank LED delivers over a standard-depth tank; going brighter without more CO2 and fertilizer usually shows up as algae rather than faster growth. CO2 is not needed for it, and its care difficulty is listed as beginner.

Does Azolla Fairy Moss need CO2?

No. Azolla Fairy Moss does not need injected CO2, so it suits low-tech tanks without a CO2 system. It is a medium-light plant, with a target of about PAR 30-60 at the leaves. Keep light, CO2 and fertilizer in balance, because raising one without the others is the most common cause of algae in planted tanks.

How do you propagate Azolla Fairy Moss?

Splits via runners. Let each new plantlet grow its own roots and a few leaves before cutting the runner, then replant it at the same depth as the parent. New growth comes in fastest when the tank matches its needs: medium light, with CO2 not needed.

Is Azolla Fairy Moss beginner-friendly?

Yes. Azolla Fairy Moss is listed at beginner difficulty. It needs medium light, with a target of about PAR 30-60 at the leaves, CO2 is not needed. Stable light, nutrients and water changes matter more than any single product. Check these needs against your current setup before buying.

Sources and references

Azolla Fairy Moss taxonomy and care recommendations cross-checked against the following authoritative references and our internal vendor + breeder database.

Have a photo of Azolla Fairy Moss?
Approved photos go live in 24 hours, with credit (or anonymous - your call).

More resources for Azolla Fairy Moss keepers

Common diseases
Helpful calculators
Key terms

Browse the full disease database, calculator collection, aquarium glossary, or Q&A library for additional reference.