Does Java Fern need CO2?

No. Java Fern grows in low-tech tanks without CO2 injection or liquid carbon supplementation.

What light does Java Fern need?

Java Fern is a low-light plant. Standard aquarium LEDs cover this with room to spare. It is one of the plants you can light from a basic shop hood and still get growth.

Is Java Fern safe for shrimp?

Yes. Java Fern is safe in shrimp tanks. The usual quarantine still applies: any plant from a commercial nursery should be soaked and rinsed first to flush copper and pesticide residue.

Image: Wikimedia Commons — attribution available on this site.

Plant appearance can vary with lighting, nutrients, CO₂, and whether it is grown submerged or emersed.

easylow lightNo CO2slow growthfern

Java Fern

Microsorum pteropus

Java Fern is an undemanding, slow-growing fern that thrives when attached to hardscape. Its tough leaves are rarely eaten by fish, making it one of the few plants safe with cichlids and goldfish. New plantlets grow on the leaf margins.

Evidence: verifiedConfidence: high

Care at a glance

Difficultyeasy

Lightlow

CO2Not needed

FertiliserNot essential

Growth rateslow

Max height30cm

Placementmidground

Min tank20L

Water parameters

Temperature18–30°C

pH6–7.5

Shrimp safeYes

Herbivore risknone

Propagationrhizome division, plantlets on leaves

Beginner guidance

Attach to driftwood with fishing line or plant-safe superglue; never bury the rhizome. Plantlets can be separated and reattached once they have a few roots.

Cautions

Rhizome must not be buried in substrate.

Sources

Microsorum pteropus. Wikipedia — Species overview including native range (SE Asia), rhizome structure, and aquarium varieties.
Microsorum pteropus. Flowgrow aquatic plant database — Light, temperature, and attachment requirements compiled from community observations.

Fish whose water overlaps

Peaceful freshwater species with overlapping temperature and pH — still run a pair check for the real mix.

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Plan the tank around this plant

Set a 20L+ footprint, then verify livestock before you buy Java Fern.

Open pair checker Tank builder

Tank hubs: 30L

Related plant guides

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All plants 30L tank hub

Common questions about Java Fern

Does Java Fern need CO2?: No. Java Fern grows in low-tech tanks without CO2 injection or liquid carbon supplementation.
What light does Java Fern need?: Java Fern is a low-light plant. Standard aquarium LEDs cover this with room to spare. It is one of the plants you can light from a basic shop hood and still get growth.
Is Java Fern beginner-friendly?: Java Fern is rated easy for difficulty. Attach to driftwood with fishing line or plant-safe superglue; never bury the rhizome. Plantlets can be separated and reattached once they have a few roots.
Is Java Fern safe for shrimp?: Yes. Java Fern is safe in shrimp tanks. The usual quarantine still applies: any plant from a commercial nursery should be soaked and rinsed first to flush copper and pesticide residue.