"David Hickman" wrote in message
...
After 15 years with no problems, our small pond has suddenly become
heavily
infested with blanket weed. We pull out armfulls but it grows back
in
a
few days. I've seen remedies advertised but I would first like to
hear
from someone who has tried them. We have lots of wildlife and I
don't
want
to harm anything. Apart from the blanket weed the water is clear
and
healthy.

I've tried something called Ecotreat Clarity, it's supposed to have
beneficial bacteria and be harmless to wildlife. It seems to have some
effect but you need to pull out as much as possible before you put it in.
I got it from Chase Organics (online)