Water lentils float on the surface and grow very fast. If they are introduced
into a tank, either deliberately or accidentally, they can colonize the entire surface,
so they must be eliminated regularly.
The duckweed is often confused with L. gibba, but its leaves do not exceed 1
cm in length. It can be used to provide shade in one part of the aquarium, or a
refuge for fry. Size: around 1 cm.