I cant remember where I heard of this... I think the University of
Queensland uses it in their lakes to control excess algae, and I think it
helps keep the plants down too. You might need multiple bales, do you have a
smaller pond to try it on first?

Anyway, I think it's worth a shot, and if it works, you've got a cheap
solution to your problem. If not, you've not wasted much money at all.

I don't think that the hay was broken up. I think it works by taking the
nutrients and oxygen out of the water, because the microbes use it all up
whilst breaking the hay down. Even if it doesn't remove the duckweed, your
lake will be algae free.

Good luck.
Jade.

"Andrew G" wrote in message
...

"Jade" Jade_at_Jaywings_dot_com wrote in message
u...
Throw a bale of hay in. (this is not a joke, just try it)
:0)
Jade

Would this work on a large scale? I'm talking one dam would be close to
the
size of a football field.
Do the bales have to be broken up first and spread over it?
We could try it, we have hay at work :-)
Getting in some "natural" chemical to try tomorrow, but somehow I don't
think it will work.
cheers
Andrew