The message
from "Annabel" contains these words:

I didn't mean to imply it wasn't a good thing, what I mean is that this
is a standard, well tried and tested, method which I would have thought
was the first thing to do, other than drainage, to combat moss.

Obviously the OP didn't know, nor could he read your thoughts.
Newsgroups don't operate by telepathy. Please read the abc for newcomers
post which appears weekly, and find out how to edit quoted posts.

Janet