Eriocaulon setaceum Care Guide
Eriocaulon setaceum is a submerged aquatic annual herb with thread-like leaves, native to South Asia, New Guinea and northern Australia, kept by advanced aquarists in soft acidic water.
Overview
Eriocaulon setaceum is a submerged aquatic plant in the pipewort family. Unlike the tight rosettes typical of the genus, it develops long, fine, thread-like (filiform) leaves on elongating submerged stems. According to aquatic plant sources, its submerged leaves are very light green to almost white and reach roughly 5 cm in length. It is regarded as a demanding species suited to experienced aquarists.
Taxonomy
- Family: Eriocaulaceae
- Genus: Eriocaulon
- Scientific name: Eriocaulon setaceum
- Life cycle: submerged aquatic annual herb
Habitat
Reported native range covers India, Malaysia, Indonesia, New Guinea and northern Australia (Northern Territory, Western Australia and Queensland). In the wild it grows in rocky sandstone escarpment country and sandy, nutrient-poor areas, often in non-permanent wet-season pools. Plant size varies with conditions, from about 50 mm across in lean rocky sites to around 150 mm in richer, mulch-laden spots.
Tank requirements
- Temperature: 22-28 °C (72-82 °F)
- pH: 5.0-6.8
- GH: 1-6 °dGH
- Lighting: high
- CO2: required
- Substrate: nutrient-rich
- Placement: midground
- Maximum height: ~30 cm
Cultivation
The species needs soft water, intense lighting and reliable CO2 injection. It tends to rot off at the base when nutrient levels in the water column are elevated, so a clean, nutrient-rich substrate combined with low dissolved nutrients is preferred. A consistent supply of micro- and macronutrients supports survival and colour.
Propagation
As an annual, it is naturally grown from seed each season, which makes long-term aquarium culture difficult. Vegetative increase through cuttings and division of established clumps is possible but unreliable; hobbyists report it as one of the harder eriocaulons to keep going.