Broadleaf Chain Sword (Helanthium bolivianum 'Quadricostatus') – Easy Runner Plant, No CO2
A green lawn that plants itself.
Broadleaf Chain Sword (Helanthium bolivianum 'Quadricostatus', sold for years as Echinodorus quadricostatus) sends out runners and fills in on its own. Each runner makes new plantlets until you have a dense, grassy lawn about 4–6 inches tall.
The problem
Most "carpet" plants in stores need CO2, high light and bottled fertilizers to spread, and they melt away in a low-tech tank. Chain sword feeds through its roots, so it spreads in a soil-based tank with ordinary light.
The Father Fish way
The Father Fish method gives root feeders like this everything they need: a soil base under a sand cap, feeding the roots for years. You don't need CO2, root tabs or liquid fertilizers.
Your plan
- Plant it in the sand cap. Push the roots about one inch into the sand cap, not into the soil, with the crown just above the sand. The roots find the soil on their own.
- Give it light and time. Low to moderate light works, and more light means faster spread. Expect runners within a few weeks.
- Thin or trim. Let it fill in, then snip runners to keep borders neat or to share plantlets.
What you get
- 1 plant, bare root
- Height about 4–6 inches (10–15 cm), with leaves about 8–9 mm wide
- Best as a low midground plant, or foreground in larger tanks
- 72–82°F, pH about 6–7.5. Shrimp- and fry-friendly cover.
Melt note: Farm-grown leaves may melt back as the plant switches to underwater growth. Trim melting leaves at the base and leave the roots alone. New leaves follow.
Why it matters
Chase a high-tech carpet without CO2 and you get bare sand. Plant chain sword in living soil and the lawn builds itself.
Pair with Aqua Preta Complete Substrate for years of root feeding.
FAQ
- Does it need CO2? No.
- How deep do I plant it? About one inch into the sand cap, crown above the sand. Never into the soil.
- Why are leaves melting? It's adjusting from farm to aquarium. Trim, and keep the roots in place.
- Is it a nano carpet? No. It's a taller, bolder lawn, about 4–6 inches.
