(Bag of 3 stems)
Ceratophyllum for natural aquariums and ponds: versatile oxygenating plant
Discover Hornwort, the perfect floating, oxygenating plant for the natural aquarium. Water purification, fast growth, and algae control.
What is Hornwort?
Aquarium Hornwort (Ceratophyllum demersum), the famous "Hornwort," also called "coontail," is an aquatic plant with very fine, toothed leaves that is highly popular in natural aquariums. It can be used floating or planted and is particularly appreciated in low-tech aquariums, low-tech tubs, and ponds.
Benefits of Ceratophyllum demersum in a natural aquarium
- Intense oxygenation of the water
- Effectively combats algae by absorbing excess nutrients ("nitrate pump")
- An ideal natural refuge for fry and small fish
- Very attractive thanks to its fine, delicate foliage
- Compatible with low-tech tubs and filterless aquariums
- Excellent resistance to high temperatures, ideal for summer tanks
How do you care for Hornwort?
- 🌿 Fast growth, requiring regular monitoring
- 🌿 Without true roots, it can float freely or be lightly anchored
- 🌿 Prefers medium to high light
- 🌿 Tolerates a wide range of temperatures
- 🌿 Remember to thin it out regularly to prevent excessive density
Our tips for using Hornwort
Hornwort is a must-have for community aquariums, low-tech tubs, and ponds. Use it floating for rapid water purification or planted for a more structured decorative effect. It naturally pairs with duckweed or Azolla to make use of the light, or with floating frogbit for added aesthetic appeal.
“Hornwort is an irreplaceable plant for oxygenating and purifying a natural aquarium without filtration.” — Mattier
FAQ Ceratophyllum demersum in an aquarium or pond
Can Hornwort be planted?
Yes, but it also grows very well while floating freely. As it has no true roots, it only draws nutrients from the water. Planting it is simply an aesthetic choice.
Is it suitable for an aquarium without a filter?
Absolutely, it oxygenates the water very efficiently using light as its only source of energy. The current created by the filter or pump then becomes unnecessary.
Does Ceratophyllum need substrate?
No, this plant grows without substrate, directly in the water. Even a bare bottom suits it!
Can it be mixed with floating plants?
Yes, especially with duckweed or floating frogbit, for a beautiful visual harmony.
Is it invasive?
It can become so if the light is strong enough and nutrients (nitrates and others) are abundant. In that case, simply remove the excess. This removes nitrates from your aquarium, tub pond, or pond in plant form!
