- Stem plant
- Easy
- Light: low to high (sources differ)
- CO₂: not needed
Hornwort
Ceratophyllum demersum
Easy stem plant for medium and high light. It grows without added CO₂. It is used in the background and floats at the surface. Growth is medium, and it is rated easy to keep.
Sources compared · 3 sources · Reviewed Oct 3, 2026
At a glance
- Plant type
- Stem plant Background, Floating
- Light
- Low to high (sources differ)
- CO₂
- Not needed
- Difficulty
- Easy Growth rate: Medium
- Height
- 6–15 in (15–38 cm)
- Water
- Not recorded pH 6.5–7.5
- Leaf color
-
- Green
- Propagation
- Cuttings
- Botanical name
- Ceratophyllum demersum
In the tank
Our sources don't record anything else about this plant in the tank.
Origin
Native to Worldwide
Sources
Where to buy
Prices rechecked dailyAll photos
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Ceratophyllum demersum stems with whorls of forked needle-like leaves on pale stone -
Ceratophyllum demersum stem with whorled leaves and small male flowers
Questions
Does Hornwort need strong light?
Hornwort grows in medium or high light.
Does Hornwort need CO₂?
No. Hornwort grows without added CO₂.
Where does Hornwort go in the tank?
Hornwort is used in the background and floating.
