Can duckweed grow in koi pond water?

Duckweed can indeed grow in koi pond water. Duckweed is a small, free-floating aquatic plant that is commonly found in ponds, lakes, and other bodies of water. It is a hardy plant that can tolerate a wide range of water conditions, including those found in koi ponds. Duckweed can provide some benefits to koi ponds, such as providing shade and cover for the fish, and it can also help to reduce algae growth. However, duckweed can also become a nuisance if it overgrows, as it can block sunlight from reaching the bottom of the pond and compete with other plants for nutrients. Therefore, it is important to monitor the growth of duckweed in koi ponds and remove it if it becomes too dense.