Water parameters
Temperature12–28°C
pH6–8
General hardness (GH)2–20 dGH
Recommended range
Overview
Wolffia is among the smallest flowering plants in the world. Each plant is nothing more than a round or oval green grain about 1 mm across; it has no roots and no leaves. When thousands of them gather together, they look like a thin layer of green powder on the water surface; this is also where the English name "watermeal" comes from. It is often found together with duckweed.
Planting and Placement
It is not planted; it is placed on the surface. Because it is so small it is hard to collect with a net; keeping it in a separate container makes it easier to control.
Care and Fertilization
- Light: Moderate.
- CO₂: Not required.
- It multiplies very fast by budding. Some aquarists grow it in separate containers as food for fry and plant-eating species. Once it gets into the main aquarium, like duckweed, it is hard to remove completely. Do not throw the excess into natural waters.
Propagation
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Common Problems
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Hobbyist notes
Things you won't find in books, learned by trial and error. The most helpful ones are on top.
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Change history and contributors
- Page created · October 16, 2026