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Ceratophyllum demersum

Rigid Hornwort

Ceratophyllum demersum

Rigid Hornwort

  • Very fast grower
  • Undemanding
  • Recommended for initial planting and breeding tanks
  • Rootless, also growing as free-floating plant
  • Competes with algae
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Description

An undemanding, very fast growing plant, used since the beginning of the aquarium hobby. The Rigid Hornwort or Coontail has a nearly worldwide distribution, especially in nutrient-rich waters. Ceratophyllum species do not have roots, they grow planted in the ground as well as free floating below the surface.

The Rigid Hornwort can be used for cold as well as tropical tanks and is recommendable for initial planting. It absorbs excess nutrients very quickly, which makes it a great ally for battling algae. It is also very recommendable for fish and shrimp breeding tanks.

Please be aware that the submerse form of this plant could contain snails and other invertebrates.

Ceratophyllum demersum, also known as hornwort or coontail, is a ubiquitous aquatic plant, a true cosmopolitan. It is found floating or anchored in the ground, in manifold stagnant to slow-flowing waterbodies. This plant has been used in aquaristics since the beginnings of the hobby.

C. demersum is in reality a collective name for a number of species, which can only safely be discerned from each other by the number of spines on their fruit. In the aquarium, these fruit do not form, as a rule.
The adaptation of Ceratophyllum to a life under water is extreme. Its inconspicuous flowers open under water, and the pollen from the male flowers gets to the female flowers through the water (hydrophily).

The cultivation of C. demersum is easy. This plant is completely rootless and grows equally well floating under the water surface or anchored on the ground. (read more)

Common names Rigid hornwort, Hornwort, Coontail, Coon's tail
Complete botanical name Ceratophýllum demérsum L.
Family Ceratophyllaceae
Genus Ceratophyllum
Difficulty very easy
Usage Background, Plant for spawning, Midground, Water surface
Aquascaping fine-leaved
Growth very fast
pH value 6 - 9
Temperature tolerance 4 - 30°C
Carbonate hardness 5 - 24°dKH
General hardness 0 - 30°dGH
Propagation Fragmentation, Cuttings
Can grow emersed? no
Source Flowgrow
Common names
Rigid hornwort, Hornwort, Coontail, Coon's tail
Complete botanical name
Ceratophýllum demérsum L.
Family
Ceratophyllaceae
Genus
Ceratophyllum
Difficulty
very easy
Usage
Background, Plant for spawning, Midground, Water surface
Aquascaping
fine-leaved
Growth
very fast
pH value
6 - 9
Temperature tolerance
4 - 30°C
Carbonate hardness
5 - 24°dKH
General hardness
0 - 30°dGH
Propagation
Fragmentation, Cuttings
Can grow emersed?
no
Source
Flowgrow

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