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21-06-2006, 11:29 PM posted to uk.rec.gardening

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Duck weed

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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.

Probably duckweed, if the leaves are roundish. Only other thing it might
be is water fern, which looks vaguely ferny (it is actually a fern)

I think
this spreads manically. Should I remove it all before it covers every
inch?

No, not particularly. You can remove some of it if you feel it's too
much and you'd like to see a bit of clear water. It has an advantage in
that it cuts down light to the pond and makes it more difficult for
blanket weed (fine green threads which grow everywhere and mat together
like a wet blanket when you try to scoop them out) and algae (the small
green algae that you can't see individually but make the pond like pea
soup) to flourish.

Is the best way to do this with a net,

Yes , or scoop it off with your hands.

or do I have to resort to
chemical means?

Avoid chemicals - you'll risk harming the tadpoles, and also all the
other creatures that you'll have in there which are contributing to a
balanced pond. Upset the balance and you end up with pea soup or worse.

Will it cause problems by starving the other plants

No

or
blocking the light into the water?

Yes - but this is an advantage not a problem.

--
Kay

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