Fairy Moss
I have some of this in my pond and I have to say it does indeed have a magical ability to cover the pond's surface completely if you don't keep hauling it out. The non-native answer to duck weed me thinks.
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I have some of this in my pond and I have to say it does indeed have a magical ability to cover the pond's surface completely if you don't keep hauling it out. The non-native answer to duck weed me thinks.
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It looks very pretty.
One website says that koi "like to nibble on it". I don't know how many nibbling koi you would need to keep it under control.
It does not thrive nor survive in central Scotland. Very susceptible to water temp.
I didn't realise the impact of this species...sigh
http://www.nonnativespecies.org/factsheet/factsheet.cfm?speciesId=451
The water boatmen seem to be eating mine that fishy sent me. Maybe it takes a time to establish, it looks lovely at the moment. Just collected around the edges. Absolutely no slimey blanket weed at all.
I regret sending you some Lyn
There 'is' apparently a species of North American weevil that feeds on fairy moss (Azolla). You can buy some from the company for just £120. A bargain 
When I lived in Hull I used to scoop fairy moss out of the pond by the handful. A couple of hundred miles north it just does not survive. Bonus!