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Aquarium Roots

Guppy Grass (Najas guadalupensis)

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Guppy Grass (Najas guadalupensis)Transform your aquarium with the lush, effortless beauty of Guppy Grass, also known as Najas guadalupensis or common water nymph—a fast-growing aquatic plant native to North, Central, and South America.
This beginner-friendly species is a favorite among aquarists for its delicate, grass-like appearance with fine, bright green leaves branching in whorls along slender stems, creating a natural, bushy hideaway.
Key Features:
  • Striking Appearance: Features narrow, fragile leaves in vibrant green, resembling fine grass blades for a soft, feathery texture that adds natural movement and depth.
  • Growth Habit: Rapidly growing stem plant that can reach 30-90 cm (12-36 inches) or more; perfect as a floating mass or planted in midground/background. Grows densely for excellent coverage.
  • Care Level: Very Easy – Thrives in low to high lighting (low light preferred to avoid algae), no CO2 required, and minimal nutrients. Temperature: 18-30°C (64-86°F); pH: 6.0-8.0. Can be floated, weighted, or rooted.
  • Benefits: Ideal hiding spots for fry, shrimp, and small fish; oxygenates water, absorbs nitrates/ammonia/toxins to improve water quality and control algae.
  • Propagation: Extremely easy – fragments easily; simply trim pieces and replant or let float to root and grow new plants.
Perfect for breeding tanks, shrimp setups, or low-tech aquariums, Guppy Grass adds a vibrant, functional touch while supporting a healthy ecosystem. Note: Its fast growth means regular trimming is recommended to prevent overgrowth; broken pieces will quickly establish new plants.