I've heard that an aerator can help control duckweed growth.

Also this site about duckweed says that many animals will eat duckweed and keep it in check. Im thinking of combining fish with an aerator and hopefully I wont be skimming every few days.

The site also has some other ideas for controlling duckweed but doesn't really say what works or what is the best way to go about it. Suggestions? Anyone know a site with better info about duckweed?