Being as duckweed likes still water, how do you control the mosquito population?
I don't know where the concept of duckweed needing still water to grow came from. The duckweed in my grow bed is flowing constantly in one end and out through the overflow stand pipe at the other back to the fish pond. It isn't swift like the Colorado rapids, but it's flowing at a pretty good rate.

Additionally, I have 20 Ryukin goldfish in the grow bed to eat anything that moves that will fit in their mouths...no mosquito larvae there.