Is Duckweed Bad for Ponds

Duckweed is not harmful to your pond or any fish or animals living in the pond. … Duckweed takes up a lot of nitrogen from the water and can help control nutrient loading problems, however, to some, this growth is unsightly or shades so much surface area that other plants in the pond fail to thrive.

Should I remove duckweed from my pond?

Unless you simply hate the look of duckweed on your pond, the only reason you would need to remove it is if the duckweed is growing too fast and causing issues with water conditions. This is especially true in ponds with fish, as excess duckweed can actually reduce oxygen levels and cause harmful spikes in ammonia.

Does duckweed oxygenate water?

Algae and duckweed produce oxygen as a by-product of photosynthesis. This is vital for aquatic creatures. … The water separates into warmer, oxygen-producing surface levels and colder, oxygen-consuming lower levels, due to shade from surface vegetation.