"SjT" wrote in message
...
Baron Von Strawberry sayed:

Buy some Barley straw from your local aquatic centre and chuck a bag
into your pond. The water won't go green and it kills off the blanket
weed. As the straw rots it gives off bacteria that eat the blanket weed
etc.

I don't know about it "giving off bacteria", but barley straw is often used
to compete with algae and clarify pond water.

--
BV.
www.iheartmypond.com