"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?

I get the stuff also. I have a swimming pool skimmer and skim it off.
It tends to be more prevalent at certain times of the year, especially
the spring. Other times it recedes.
--
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18,000 gallon (17'x 47'x 2-4') lily pond garden in Zone 6
Cheers, Steve Henning in Reading, PA USA