In article , Kay Easton
writes

If you mean Azolla, it isn't a moss but a fern. It is an invasive alien
species, and is already invading our wild ponds.

But you deliberately introduced it into your ponds to control the
algae!!!!!!!!!!! And, years ago, you advised us to do the same ))
--
Jane Ransom in Lancaster.
I won't respond to private emails that are on topic for urg
but if you need to email me for any other reason,
put jandg dot demon dot co dot uk where you see deadspam.com