Eriocaulon sp Vietnam

Quick facts

Identity

Also known as

Vietnam Pipewort; Eriocaulon Vietnam

Synonyms

Eriocaulon breviscapum (trade name for some Feather Duster stock)

Environment

Freshwater

Native to

India, Southeast Asia (Vietnam)

Habitat

Shallow, soft, acidic streams and seasonally flooded rocky riverbeds, often rooted in gravel between boulders in mountain rivers

Sourcing

Both

Conservation

Not Evaluated

Care

Care level

Moderate

Growth form

Rosette

Max height

4 – 24 in (10 – 61 cm)

Spread

8 in (20 cm)

Growth rate

Slow

Placement

Midground, Background

Water

Temperature

68 – 78 °F (20 – 26 °C)

pH

5.5 – 6.8

GH

1 – 6 dGH

dKH

0 – 2 dKH

Flow

Moderate

Light

High

CO₂

Beneficial

Planting

Substrate

Nutrient-rich preferred

Feeds from

Both

Fertilizer needs

Medium

Colors

Green

Feeding & breeding

Propagation

Rhizome division

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Care guide

Overview

Eriocaulon sp. Vietnam is a rosette-forming pipewort from Southeast Asian mountain rivers, sending up whitish needle-thin leaves and branching into dense clumps of lateral shoots over time. It ranks among the more demanding members of the genus, needing high light, consistent CO2 and soft, low-mineral water to avoid crown rot or stalled growth. Root establishment after planting is often slow.

Care

Eriocaulon species form a rosette of narrow, grass-like or needle-thin leaves radiating from a central rhizome, gradually producing offshoot rosettes that build into a dense clump. Most named forms in the trade, including Feather Duster, do reasonably well under medium to strong lighting and appreciate soft, slightly acidic water with stable parameters. The Vietnam form is considerably more demanding, requiring higher light, consistent CO2 injection and low mineral content to avoid stalling or rotting at the crown. Sudden changes in water chemistry or poor root establishment after planting are the most common causes of failure with this genus.

Planting & trimming

Plant the rhizome shallowly with roots tucked into the substrate but the crown left exposed, since burying the growing point invites rot. Space clumps to allow the fine leaves to fan out and sway without excessive shading from neighboring plants. Established clumps are trimmed by removing older, yellowing outer leaves and separating overcrowded daughter rosettes at the rhizome.

Fertilizing

Water column dosing of a complete macro and micronutrient fertilizer is usually sufficient, since a nutrient-rich substrate is not strictly required though it can support faster establishment. Iron and trace element supplementation helps prevent the pale or yellowing new growth that signals a micronutrient deficiency. CO2 supplementation is beneficial for all forms and close to mandatory for finicky variants like the Vietnam type, which struggles without it.

Propagation

Propagation is done by dividing mature clumps and separating the individual daughter shoots that form along the branching rhizome. As plants age the rootstock can grow upward above the substrate; the upper portion with its leaf rosette can then be cut free and replanted, leaving the remaining base to branch further. Growth is slow enough that plantlets take some time to reach a size worth separating.

Problems

New imports often arrive with a reduced root system and can sit without visible growth for weeks while they rebuild roots, sometimes shedding a few older leaves in the process. Melting of outer leaves shortly after planting is common and not necessarily fatal as long as the crown and rhizome remain firm. Algae fouling on the fine leaves can become a persistent problem in tanks with excess nutrients or insufficient flow, since the thin foliage is hard to clean by hand.

Sources

1. Eriocaulon sp. "Feather Duster" - Aquasabi
2. Eriocaulon breviscapum 'Feather Duster' - Fitz Fish Ponds
3. Eriocaulon breviscapum - Aquasabi
4. A World of Eriocaulon Aquarium Plants - Biotope One

Varieties in the catalog

Eriocaulon Feather Duster