Our engineers tell us that goldfish will control duckweed. They are occasionally stocked in our wastewater lagoons for this specific purpose. I have put duckweed in my wine barrel pond with goldfish and it doesn't last more than a week. Then again, i never feed them so their probably awefully hungry. Good luck.


Richard Dennis
EP Aeration
[email protected]
www.epaeration.com
(800) 556-9251