Description
Hornwort (Ceratophyllum demersum) is a classic go-to for aquarists who want hardy, hassle-free greenery. With its fine, feathery needles and bushy texture, Hornwort creates a forest-like feel in your aquarium—and it grows fast. Like, really fast.
Whether left floating or gently anchored, this plant provides excellent cover for fish, fry, and shrimp, while soaking up excess nutrients and helping fight algae. It’s also one of the few plants that thrives without roots, making it perfect for beginners and breeding tanks alike.
Care and Planting Directions
No roots? No problem. Hornwort can be floated freely or gently weighted down—just don’t bury it. It prefers cooler water and moderate to high lighting but is famously adaptable. Trim as needed to control growth and remove excess shedding if it gets too enthusiastic.
Specs
Name: Ceratophyllum demersum
Common Name: Hornwort
Difficulty: Easy
Light: Low to High
CO₂: Not required
Height: 6–24 inches or more
Substrate: Not required (free-floating or anchored)
Growth Rate: Very fast
Propagation: Fragmentation (break off a stem and replant or float)
Aquarium Placement: Background / Floating
