On Fri, 17 Oct 2008 13:33:13 EDT, "Tony" wrote:

Large pond has thick carpet of small rough edged duck weed type floating
plant. I think it's called azola.
It has almost completely covered pond and fish are dying
Probably oxygenators not getting light .
The question is how do I eradicate?

Hi Tony, if you have freezing weather where you are, it will usually kill
it... Koi may eat it, if there is nothing else in the pond for them to eat.
Hope for a sustain freeze this winter? ~ jan
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Zone 7a, SE Washington State
Ponds: www.jjspond.us