Dwarf Hairgrass (Eleocharis acicularis)
Dwarf Hairgrass (Eleocharis acicularis) is a staple freshwater aquarium plant used for cover, nutrient uptake, and aquascape texture. This guide mirrors our other plant profiles with habitat notes, appearance, placement, lighting, nutrients, water parameters, propagation, compatibility, and troubleshooting.
Natural Habitat and Origin
In nature, related populations inhabit shallow freshwater edges, quiet channels, or flooded margins where light reaches the water column and organic sediment fuels growth. Those conditions explain why the plant responds well to aquarium soil, liquid fertiliser, and regular trimming.
Appearance and Growth Habit
Expect heights around 2–6 inches (5–15 cm), shorter when trimmed as a carpet with a moderate to fast with good light growth rate under typical lighting. Use it as a foreground / carpet plant. Healthy specimens show intact leaves without melt, clear growing tips, and steady new shoots after water changes.
Aquarium Placement and Hardscape Use
- Reserve space according to mature height so it does not shade neighbours without intent.
- Combine with contrasting leaf shapes for depth.
- Trim tops or outer runners to keep compact shapes and encourage bushier growth.
- In shrimp tanks, dense growth creates grazing surfaces and fry shelter.
Light, CO2, and Nutrients
- Light: medium to high for dense carpets
- CO2: recommended for lawn-like carpets; optional for sparse clumps
- Fertiliser: root tabs for substrate-rooting species; liquid macros/micros for water-column feeders
- Substrate: nutrient-rich soil accelerates rooted growth; inert gravel can work with supplements
Water Conditions
- Temperature: 59–79°F (15–26°C)
- pH: 5.5–7.5
- Flow: gentle to moderate
- Maintenance: remove yellowing leaves and thin overcrowded stems
Propagation
Propagate by cuttings, runners, or division. Replant healthy tops, reattach epiphytes with thread or gel glue (never bury rhizomes of Anubias/Buce-style plants), and discard soft rotting material.
Compatibility
Dwarf Hairgrass pairs well with peaceful community fish, shrimp, and snails. Large plant-eating fish or heavy diggers may uproot or shred it.
Ease of Care
Care level: intermediate for carpets; easier as loose clumps. Match light and nutrients, then allow time to settle before reshuffling the scape.
Common Problems
- Melt after emersed-to-submersed transition
- Algae on slow leaves from excess light without plant mass
- Leggy stems from insufficient light
- Pinholes or pale growth from micronutrient gaps
Related Reading
Conclusion
Dwarf Hairgrass (Eleocharis acicularis) earns its place through practical growth and visual texture. Give it suitable placement, steady light and nutrients, and routine trimming for dependable planted-tank performance.
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