Care Guide
Trident Java Fern
Microsorum Pteropus Trident
Care at a Glance
Lighting
Low
Growth Rate
Slow
Growth Form
Rhizome
Placement
Mid-background
True Aquatic
Yes
Available As
Bare root, on wood
About This Plant
Microsorm pteropus ‘Trident’ , Is one of the many varieties and cultivars of Java fern available. Like the species, ‘Trident’ is a wonderful aquarium plant both for beginners and for more experienced hobbyists. Java fern is very adaptable, and will grow happily in very low light “fish tanks” with no CO2 but will also do well at much higher light levels with supplemental CO2 as long as the water is kept clean. (otherwise, like other slow growing plants, it can become infested with algae in a high light situation) It is important to attach Java ferns to either a piece of wood or rock and not to bury the roots in the substrate or they can rot. The plant reproduces easily in the aquarium, both by rhizome and by producing plantlets on the tips of older leaves.
About the Microsorum Genus
Family — Polypodiaceae
Microsorum (Java fern) is an epiphyte attached to wood or stone — never bury the rhizome or it rots. It is among the most beginner-friendly aquarium plants, tolerating low light and a wide pH/temperature range.
Quick-Reference Details
- Common name
- Trident Java Fern
- Scientific name
- Microsorum Pteropus Trident
- Family
- Polypodiaceae
- Native to
- Asia
- Difficulty
- Advanced
- Requirements
- Undemanding
- Lighting
- Low
- Growth rate
- Slow
- Growth form
- Rhizome
- Placement
- Mid-background
- True aquatic
- Yes
- Available as
- Bare root, on wood
Difficulty — Advanced
Performs best with strong lighting, CO2 supplementation, and stable water parameters. Not recommended as a first plant.
CO2 & Fertilization
CO2 is not required. This plant performs well in low-tech tanks with only basic liquid fertilization.
Tank Size & Setup
Best in tanks 20 gallons or larger so background stems have room to grow up and be trimmed without overtaking the foreground.
Aquascaping & Placement
Place in the midground between foreground carpets and tall background stems. The structure adds visual depth and shelters small fish and shrimp. The rhizome is the green horizontal stem. Attach it to driftwood, lava rock, or stone with cotton thread or super-glue gel — burying the rhizome causes rot.
Tank-Mate Compatibility
Compatible with the full range of community-tank species — tetras, rasboras, livebearers, corydoras, and most other peaceful freshwater fish do not damage the foliage. Tough enough for cichlid tanks and goldfish setups where most other plants are uprooted or eaten — the leaves are too leathery for those fish to chew through.
Pro Tips for Growing Trident Java Fern
- 1Never bury the rhizome — tie it to wood or stone until roots grip.
- 2Java fern reproduces by black plantlets on leaf tips; remove and reattach them or let the colony self-spread.
- 3Brown spots are usually normal sporing, not disease.
Common Care Issues
Rhizome rot
The rhizome (the thick horizontal stem) must stay above the substrate. Buried rhizomes turn black and mushy within a few weeks. Tie the plant to hardscape or wedge it between rocks instead.
Pale or stretched leaves
If new growth comes in pale yellow or the stems stretch unusually long, the plant is reaching for more light. Either raise the fixture's intensity or add a richer fertilizer.
Algae on old leaves
Slow growers accumulate dust and spot algae on older leaves. Wipe affected leaves with your fingers during water changes, and consider adding a few Amano shrimp or Otocinclus as cleaners.
Frequently Asked Questions
How much light does Trident Java Fern need?
Trident Java Fern (Microsorum Pteropus Trident) prefers low lighting. Standard tank lighting is sufficient — no specialty fixture is required.
Does Trident Java Fern need CO2?
CO2 is not required. This plant performs well in low-tech tanks with only basic liquid fertilization.
Is Trident Java Fern good for beginners?
Trident Java Fern is rated advanced-level. Performs best with strong lighting, CO2 supplementation, and stable water parameters. Not recommended as a first plant.
How fast does Trident Java Fern grow?
Growth rate is slow. Be patient — visible new growth may take 3-4 weeks, but the plant is famously low-maintenance once settled.
What fish and invertebrates are compatible with Trident Java Fern?
Compatible with the full range of community-tank species — tetras, rasboras, livebearers, corydoras, and most other peaceful freshwater fish do not damage the foliage. Tough enough for cichlid tanks and goldfish setups where most other plants are uprooted or eaten — the leaves are too leathery for those fish to chew through.
Available to Purchase
Trident Java Fern — $19.99
Free 2-day shipping on orders over $100