Care Guide

Pygmy chain sword

Helanthium Tenellum

Advanced difficultyIn Stock

Care at a Glance

Lighting

Moderate

Growth Rate

Moderate

Growth Form

Rosette, runner

Placement

Foreground

True Aquatic

Yes

Available As

Bare root, potted

About This Plant

Helanthium tenellum is a great sword plant to be used in foreground or midground areas of the aquarium. Pygmy chain sword, as it is commonly called, spreads by runners and can form a nice carpet in the foreground areas of the aquarium. Helanthium tenellum is a native to the warmer parts of North, Central and South America. This plant was sold for many years under the name, Echinodorus tenellus . However the chain swords, as a group have been moved to the genus Helanthium .

Quick-Reference Details

Common name: Pygmy chain sword
Scientific name: Helanthium Tenellum
Family: Alismataceae
Native to: The western hemisphere
Difficulty: Advanced
Requirements: Undemanding, but spreads better with a nutrient rich substrate
Lighting: Moderate
Growth rate: Moderate
Growth form: Rosette, runner
Placement: Foreground
True aquatic: Yes
Available as: Bare root, potted

Difficulty — Advanced

Performs best with strong lighting, CO2 supplementation, and stable water parameters. Not recommended as a first plant.

CO2 & Fertilization

CO2 is optional. Growth improves with supplementation, but the plant survives and stays presentable without it.

Tank Size & Setup

Suits tanks of any size. Foreground carpeting plants work especially well in 10-40 gallon planted setups where the viewer is close to the substrate.

Aquascaping & Placement

Use as a foreground carpeting plant. Plant small portions on 2-3 cm centers and let runners fill the gaps over 4-8 weeks. Plant the root crown just at the substrate surface. Burying the crown causes the plant to push itself back up over a few days.

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.

Common Care Issues

Slow initial growth

Most aquarium plants pause for 2-4 weeks after planting while they convert from their nursery-grown emersed form to fully submerged growth. New leaves that emerge underwater will look thinner and slightly different — this is the plant adapting, not a problem.

Frequently Asked Questions

How much light does Pygmy chain sword need?

Pygmy chain sword (Helanthium Tenellum) prefers moderate lighting. A standard planted-tank LED fixture run 7-9 hours a day is typical.

Does Pygmy chain sword need CO2?

CO2 is optional. Growth improves with supplementation, but the plant survives and stays presentable without it.

Is Pygmy chain sword good for beginners?

Pygmy chain sword is rated advanced-level. Performs best with strong lighting, CO2 supplementation, and stable water parameters. Not recommended as a first plant.

How fast does Pygmy chain sword grow?

Growth rate is moderate. Most aquarists trim every 3-4 weeks under standard conditions.

What fish and invertebrates are compatible with Pygmy chain sword?

Compatible with the full range of community-tank species — tetras, rasboras, livebearers, corydoras, and most other peaceful freshwater fish do not damage the foliage.

Available to Purchase

Pygmy chain sword — $18.99

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