Giant Duckweed (Spirodela polyrhiza)

Giant Duckweed (Spirodela polyrhiza) is the largest species of duckweed available, featuring vibrant green floating leaves that are significantly larger than common duckweed. This fast-growing floating plant provides natural shade, helps reduce algae by limiting excess light, and absorbs nitrates and other excess nutrients to promote healthier water quality.

Ideal for aquariums, ponds, shrimp tanks, and axolotl habitats, Giant Duckweed offers excellent surface cover that helps reduce stress in aquatic animals while creating a more natural environment. Unlike common duckweed, its larger fronds make it easier to manage and remove when necessary.

This hardy floating plant thrives under moderate to high lighting and multiplies quickly in nutrient-rich water. It is an excellent choice for aquarists looking for a low-maintenance, beneficial addition to their freshwater setup.

Features

• Large floating leaves that are easier to manage than common duckweed
• Fast-growing natural nutrient absorber
• Helps reduce nitrates and improve water quality
• Provides shade and security for fish, shrimp, and axolotls
• Helps limit algae growth by reducing light penetration
• Great for aquariums, ponds, breeding tanks, and shrimp habitats

Care Requirements

• Scientific Name: Spirodela polyrhiza
• Common Name: Giant Duckweed
• Care Level: Easy
• Growth Rate: Very Fast
• Lighting: Moderate to High
• CO₂: Not Required
• Placement: Floating
• Temperature: 50–86°F (10–30°C)
• pH: 6.0–8.0
• Difficulty: Beginner

Giant Duckweed is one of the easiest floating plants to grow and is an excellent natural choice for improving water quality while creating a shaded, comfortable environment for aquatic life.