Hi
It sounds like duckweed, this will become a nuisance and take over a pond
very quickly, However it does have its benefits, It will take excess
nutrients out of the water and stop the pond from turning green, "Green
water becomes short of oxygen, as I understand it" but it keeps the water
much clearer, if you net it out be careful about tadpoles, and leave any
surplus on the edge of the pond for any aquatic creatures such as fresh
water shrips to climb back in.
Check over each net to return any tadpoles to the pond

Regards
Cineman

wrote in message
...
Hello,

As I said in another post, I've moved house and there is a pond in the
garden. The pond seems to be full of weed (and tadpoles - but that's a
different post). I think it is duck weed? It looks like tiny
single-leaved plants that float on the surface of the water. I think
this spreads manically. Should I remove it all before it covers every
inch? Is the best way to do this with a net, or do I have to resort to
chemical means? Will it cause problems by starving the other plants or
blocking the light into the water?

Thanks.