Pete B wrote after TJolly.asked


Is their any chemical you can purchase that can completely get rid of
it?


Roundup will kill the duckweed but also any other plant it touches. And
no, it wont kill the fish!
A friend called in the environment agency to help him clear weed from a
fishing lake, the advice was 'roundup'. It apparently goes straight
through without causing any damage.

I would like to see the scientific evidence for that statement before using
that weedkiller in a pond, effectively a closed environment.
If it is the case why all the fuss about it's use where human food is
concerned?

--
Regards
Bob
In Runnymede, 17 miles West of London