Someone has suggested grass carp for the duckweed problem on one of our
ponds. But the general impression I get from the little I read is that they
grow to enormous sizes, are lake fish and are banned in US because they
devastate lake vegetation. Does anyone here have any experience of these in
UK and ponds, not lakes?

--
Sacha
http://www.hillhousenursery.co.uk
(remove weeds from address)
'We do not inherit the earth from our ancestors, we borrow it from our
children.'