Hornwort (Ceratophyllum demersum) – Hardy Floating or Rooted Bunch Aquarium Plant

The Hornwort (Ceratophyllum demersum) is a popular, hardy aquarium plant known for its fine, feathery green foliage and incredible versatility. It can be grown floating or anchored in the substrate, making it suitable for a wide variety of aquascapes and setups—from community tanks to fry grow-outs.

Hornwort is a fast grower and natural water purifier, absorbing excess nutrients and helping prevent algae growth. It provides excellent cover for shrimp, fry, and small fish while adding a lush, natural look to freshwater aquariums.

🪴 Key Features:

• Fast-growing and hardy—great for beginners
• Can be used as a floating or rooted bunch plant
• Helps prevent algae by absorbing excess nutrients
• Provides shelter and breeding cover for fry and shrimp
• Low-maintenance, no CO₂ required

🌡️ Care Guidelines:

• Light: Low to High
• Temperature: 60°–82°F
• pH: 6.0–7.8
• Placement: Background / Floating
• Growth Rate: Fast

💡 Pro Tip: Trim regularly to prevent overgrowth and maintain shape. Floating Hornwort shades the tank, reduces algae, and helps oxygenate the water naturally.

Frequently Asked Questions (FAQ):

Q: Can Hornwort grow without CO₂?
A: Yes—it thrives in low-tech setups with or without CO₂ injection.

Q: Should I plant Hornwort in substrate?
A: It can be anchored loosely or left floating; planting the stems too deeply can cause them to decay.

Q: Does it help with algae control?
A: Yes—Hornwort absorbs excess nutrients and outcompetes algae for resources.

Q: Is Hornwort safe for shrimp and fry?
A: 100% safe—it provides excellent cover and foraging space for shrimp and young fish.

Q: How do I keep Hornwort from shedding needles?
A: Maintain consistent water temperature and avoid sudden pH changes for best growth.