GW,

Duckweed is also used extensively by commercial Tilapia growers as fish food....in spite of some people suggesting I was wrong when I said Tilapia at high stocking rates will control duckweed and artificial feeding means you need more of them. You've probably read about closed-loop systems which rely on duckweed to feed Tilpia which are also artificially fed supplementally to produce food for the duckweed. I'm going to try it myself on a small scale.

Last edited by Bob Lusk; 09/15/07 08:39 AM. Reason: tone it down