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Coontail

Coontail
(Ceratophyllum demersum)

Strictly aquatic, this plant is perfectly suited for aquariums and outdoor pools. Resistant and robust, it is an easy species that does not have a root. It can flourish by simply floating on the surface.

Scientific name

Ceratophyllum:
Demersum
Aspera
Cornutum
Cristatum
Gibbum
Muricatum
Polyacanthum
Triacanthum
Tricorne
Verticillatum

Common name

Coontail
Hornwort
Rigid Hornwort
Common Hornwort
Hornwort coon's tail

Origin

what are his countries of origin?

Origin: Cosmopolitan

Ideal fertilization

how to fertilize this plant?

CO2: 5-40mg/l
Nitrates (NO3): 10-50mg/l
Phosphates (PO4): 0,1-3mg/l
Potassium (K): 5-30mg/l
Iron (Fe): 0,01-0,5mg/l

Group

which group is this plant?

Ceratophyllaceae

Kind

what is the type of plant?

Stem
Floating plant

Water parameters

What are the Water parameters for the maintenance of this plant?

T°: 10 to 26°C or 50 to 79°F
pH: 6 to 9
hardness: 1 to 18°dGH

Difficulty

difficulty

Easy

Minimal lighting

what brightness is needed?

Average

Size

what is the maximum size of the plant?

50 to 100 cm (20 to 39")

Plantation area

in which area of the aquarium install this plant?

Background

Growth

how fast does this plant grow?

Fast

Presentation

Who is the Coontail?

Presentation

Who is the Coontail?

Thanks to its bushy appearance, it nicely dresses the back or the surface of your tray. It will particularly please as a floating plant, the base not buried in the ground (it feeds by its leaves). Its growth is then very fast.

The immersed Coontail is a good ally for the quality of the water because it lowers the level of nitrates. This plant is also very effective in the fight against algae because it feeds on the same nutrients. In addition, it produces harmful substances that slow down the development of algae. By extension, it is in competition for food with all the other plants of the tray. If you notice deficiencies, use fertilizer.

It is ideal as a refuge for fry: it offers hiding places and a stock of micro-organisms that develop there. In addition, it does not require a substrate. As a result, it is widely used in breeding aquariums.

Be careful, it is quite fragile and breaks easily.

Finally, note that this plant prefers to be in an outdoor pond.

Planting and maintenance

How to plant and maintain the Coontail?

Planting and maintenance

How to plant and maintain the Coontail?

Place it preferably at the back of your aquarium because it grows very fast and becomes invasive.

It will also be necessary to cut it often to avoid that it gives shade to the other plants. You can just let it float (watch out for the heat from the lighting), attach it to a support with a fishing line or plant it in the ground.

It prefers slow streams and stagnant waters. Therefore, avoid placing it near the filter discharge.

Farming

How to farm the Coontail?

Farming

How to farm the Coontail?

By cuttings. Cut off the side rejects that reach about 20 centimeters or 8 inches. Stems that are too big should be overhead. Do this regularly to give light to other plants.

Good to Know

Good to Know

Find all additional information!

Its colour varies according to the brightness and the temperature.

It is sensitive to algae and if it is invaded, it will be very difficult to get rid of it.

You will easily notice a difference between C.demersum and C.submersum in the following diagram:
difference ceratophyllum

Alternative species

Alternative species

Discover the similar species

None (for the moment!)

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