In article , Peter Goddard
writes
I tried chemicals, but they were expensive, short-term and made the lillies
go spotty. Then I tried Fairy Moss to shade the pond and use up some of the
nutrients. It grows at an astonishing rate but it's not too much of a pain
to control by scooping off once a week.
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.
--
Kay Easton
Edward's earthworm page:
http://www.scarboro.demon.co.uk/edward/index.htm