Hornwort
Ceratophyllum demersum
Hornwort is an easy, fast-growing plant for low light (no CO₂ needed). Spot: background, midground, floating; 2–11.8 in tall.
Care at a glance
- LightLow: any basic LED. Medium: a planted-tank LED. Strong: a high-output planted light, usually with CO₂.
- Low light
- CO₂CO₂ is carbon dioxide for growth. "Helps" means the plant grows without it, faster and denser with it.
- No CO₂ needed
- Growth
- Fast
- Care
- Easy
- Where
- Background, Midground, Floating
- Height
- 2–11.8 in
- Temperature
- 50–86°F
- pH
- 6–9
How to plant it
- Push the stems into the substrate or let them float; it feeds through its leaves, so dose liquid fertiliser.
- Tough leaves: most plant-eaters leave it alone.
Also for this spot
Sources: Flowgrow DB: Ceratophyllum demersum · Tropica: Ceratophyllum demersum · ModestFish: Best plants for goldfish