Just an update on my duckweed.

I used the weedtrine-D(diquat), at about 1/2 the rate recommended, and it did kill my duckweed, or it's only a coincidence, and the duckweed was dying anyways?

I still have some floating, but most(maybe 75-80%) has gone, and what is still floating is gold coloured instead of green, now. I'm assuming that means it's dead?

I will spray it right away, again, if I see any green duckweed pop up.

So, as far as I can judge, the Weedtrine-D did work.

I also used it to kill the cattails directly around my dock.