Hornwort
Ceratophyllum demersum
PlantFreshwater
Ceratophyllum demersum is a rootless aquatic plant with thin, branched stems. Its leaves are whorled, fine and serrated, giving a feathery appearance. It can float freely or be planted in the substrate. Growth is very fast, effectively absorbing nitrates. It provides shelter for fry and invertebrates. In the aquarium, it prefers moderate to high light. No CO2 needed and tolerates a wide range of parameters.
Recommended parameters
| Parameter | Recommended range |
|---|---|
| Temperature | 10–28 |
| pH | 6–8 |
| GH | 5–20 |
| KH | 3–15 |
| NO₃ | ≤ 40 |
| PO₄ | ≤ 3 |
Care
Difficulty1/5
Dietphotosynthetic
Min. tank20 L
Min. group1
Adult size100 cm
Lifespan2 ans
Temperamentpeaceful
Care notes
Very easy plant. Temperature 10-28°C, pH 6-8. Moderate to high light. No CO2 needed. Soft to hard water. Fast growth, trim regularly to prevent overgrowth. Can be left floating or planted. Compatible with all fish. Avoid very strong currents. Ideal for breeding tanks. Absorbs nitrates and phosphates.