Helanthium tenellum (Tenellus) – Dwarf Chain Sword Aquarium Plant

The Helanthium tenellum, also known as the Dwarf Chain Sword or Echinodorus tenellus, is a hardy and fast-spreading carpeting plant perfect for foreground and midground aquascaping. Its fine, grass-like leaves create a lush, vibrant green carpet that adds texture and depth to freshwater tanks.

This species thrives in medium light and can tolerate a wide range of conditions, making it ideal for beginners and experienced aquascapers alike. Under stronger lighting and CO₂ supplementation, H. tenellum grows quickly and spreads by sending runners across the substrate, forming a dense mat of bright green leaves.

🪴 Key Features:

• Compact, fast-growing carpeting sword plant
• Creates a lush, grassy look in the foreground
• Thrives in medium light and stable conditions
• Propagates easily through runners
• Excellent for shrimp and nano aquariums

🌡️ Care Guidelines:

• Light: Medium to High
• Temperature: 72°–82°F
• pH: 6.0–7.5
• Placement: Foreground to Midground
• Growth Rate: Fast

💡 Pro Tip: Provide a nutrient-rich substrate or root tabs for best growth. Trim taller runners to maintain a uniform carpet and prevent shading.

Frequently Asked Questions (FAQ):

Q: Is Helanthium tenellum the same as Echinodorus tenellus?
A: Yes—they’re the same species, just reclassified under the genus Helanthium.

Q: Does it need CO₂ injection?
A: CO₂ isn’t required but helps the plant grow faster and stay shorter for a true carpet effect.

Q: How tall does it grow?
A: Usually 2–4 inches tall, making it ideal for the foreground.

Q: How does it propagate?
A: It spreads naturally through runners—just let the plant send out shoots across the substrate.

Q: Is it safe for shrimp and peaceful fish?
A: Absolutely—completely shrimp- and snail-safe, and provides great cover for fry.