For me as a duckhunter, duckweed is the greatest thing around. I have one small pond, 3/4th acre that i try to keep the duckweed in although its not easy. When i have lots of duckweed i have lots of Gadwalls and wood ducks. Unbelievably, the bass still live in this pond even though it gets full duckweed coverage at times. I have other ponds to fish so i try to keep this one covered thick.