Duckweed (Lemna Minor) is one of the fastest-growing floating aquarium plants, known for its tiny green leaves and powerful ability to absorb excess nutrients. This easy, beginner-friendly plant is perfect for shrimp tanks, fry tanks, and reducing algae in freshwater aquariums.
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Duckweed works by floating freely on the water surface, where it absorbs nitrates and other dissolved nutrients directly from the water column. This rapid nutrient uptake helps stabilize water conditions and limits unwanted algae growth. What makes Duckweed different is its extremely fast reproduction rate and minimal care requirements. It is best used in established freshwater aquariums, outdoor tubs, or breeding tanks where surface coverage, nutrient control, and natural shade are beneficial. With regular thinning, Duckweed remains an effective and natural addition to balanced aquatic systems.
Fast-growing floating plant ideal for freshwater aquariums
Absorbs excess nitrates and phosphates, improving water quality
Provides natural shade and reduces harsh lighting
Encourages natural behavior in fish and shrimp
Excellent supplemental food source for herbivorous fish
Helps limit algae growth by competing for nutrients
Creates a natural, pond-style aquarium appearance
Extremely easy to maintain, even for beginners
Promotes microfauna growth for fry and shrimp
Ideal for breeding tanks and low-tech setups
Requires a cycled freshwater aquarium
Thrives in low to moderate lighting conditions
Suitable for shrimp tanks, community tanks, and fry tanks
Prefers calm water with minimal surface agitation
No substrate required as it floats freely
Benefits from nutrient-rich water or liquid fertilizers
Regular thinning recommended to prevent full surface coverage
Compatible with most peaceful fish and invertebrates
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Specification |
Details |
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Product Name |
Duckweed |
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Scientific Name |
Lemna minor |
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Common Name |
Duckweed |
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Portion Size |
2oz portion cup |
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Plant Type |
Floating plant |
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Care Level |
Beginner |
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Growth Rate |
Very fast |
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Lighting Requirement |
Low to Moderate |
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CO₂ Requirement |
Not required |
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Temperature Range |
15–30°C |
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pH Range |
6.0–8.0 |
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Water Hardness |
Soft to moderately hard |
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Tank Size |
Suitable for all freshwater aquariums |
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Placement |
Surface |
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Propagation |
Natural division |
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Compatibility |
Fish, shrimp, snails |
A: Yes. It is one of the easiest aquarium plants to grow and maintain.
A: It can multiply rapidly, so regular removal is recommended to control growth.
A: No. It thrives in low to moderate lighting conditions.
A: Yes. It provides shade, shelter, and supports micro-organisms shrimp feed on.
A: Yes. It creates cover and encourages infusoria growth for fry.
A: Yes. It absorbs excess nutrients such as nitrates and phosphates.
A: Yes. Many fish species graze on duckweed as a natural food source.
A: Yes. Strong water movement can slow growth or push it underwater.
A: It benefits from nutrient-rich water but usually grows well without added fertilizers.
A: Yes. It is commonly used in outdoor ponds in suitable climates.
A: Manually remove excess plants during regular maintenance.
A: Yes, though strong surface-dwelling or plant-eating fish may reduce coverage.
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