Foxtail / Hornwort Ceratophyllum demersum

Foxtail, also known as Hornwort (Ceratophyllum demersum), is one of the most widely recognised and versatile aquatic plants in the hobby, beloved for its dense, feathery whorls of bright green, needle-like leaves that create a lush, flowing backdrop in any aquarium. A true survivor, it thrives in an enormous range of water conditions and requires no substrate — it can be left floating or loosely anchored, making it ideal for fry tanks, community aquariums, and low-tech setups alike. Its rapid growth also makes it a powerhouse for absorbing excess nutrients and keeping algae in check.

Propagation: Simply break or cut stems into sections of 10–15cm and allow to float or replant. New growth will emerge from each node readily.

Care Guide

• Origin: Cosmopolitan (worldwide)
• Light: Low to High
• Water Parameters: pH 6.0–8.0 | Temp 15–30°C | Adaptable to most water types
• CO2 Required: No
• Fertiliser: Benefits from liquid fertiliser; absorbs nutrients directly from the water column
• Placement: Floating or Background
• Skill Level: Beginner
• Max Size: Stems to 100cm+