Duckweed

Lemna minor

Family : Araceae

PlantFreshwaterfloating

Duckweed is a very common small floating plant, often used in aquariums to absorb nitrates and provide cover.

Duckweed — photo 1 sur 4
Famartin · Wikimedia Commons · CC BY-SA 4.01 / 4
Popularity
Easy plant
standard lighting, few requirements
Availability
Common in shops
Shop availability
IUCN Status
LC
Least Concern
Biotope
Europe
Poissons et invertébrés d'Europe tempérée.

Description

Lemna minor is a floating aquatic plant of the Araceae family. It measures 1 to 5 mm in diameter, with one or two light green oval leaves and a single fine root. It reproduces quickly by vegetative division, forming dense colonies. In an aquarium, it can cover the entire surface if not controlled. It is very hardy and adapts to various water conditions. It serves as a refuge for fry and invertebrates. Its rapid growth makes it an excellent biological filter.

Habitat

Region :

Duckweed grows in stagnant or slow-moving, nutrient-rich waters such as ponds, marshes, ditches, and eutrophic lakes. It forms a green floating mat on the surface, often in association with other floating plants. It tolerates a wide range of conditions but prefers calm, sunny waters.

Distribution :

Recommended parameters

Temperature1530 °C
pH68
GH215 °dGH
KH210 °dKH
NO₃
≤ 20 mg/L
PO₄
≤ 1 mg/L

Care

Difficulty
1/5
Diet
Photosynthetic
Min. tank
20 L
Min. group
1
Adult size
0.5 cm
Lifespan
1 years
Temperament
Peaceful
Propagation
Division végétative rapide ; se multiplie par fragmentation des frondes.

Care notes

Duckweed is very easy to grow. It thrives under moderate to strong lighting, with a temperature of 15-30°C. A pH of 6.0-8.0 and low to moderate hardness are suitable. It absorbs nitrates and phosphates, helping to control algae. Avoid strong water flow that scatters the plants. Regular trimming is necessary to prevent total shading. It can be easily removed with a net. Be careful not to introduce it accidentally into natural waterways.

Similar species

Espèces proches, même habitat ou même maintenance

References