In a message dated 10/20/01 2:54:13 PM, Aquatic-Plants-Owner at actwin_com writes: << >> Well, in an outdoors situation, some Koi will eradicate it. They will eat it in preference to other plants, but when it is all gone - they will start eating anything else. I confess to often wanting a selective Herbicide that will kill ONLY duckweed. Sigh. Jean