Just a follow up to give a warning on attacking a lily root mass !!

I pumped the pond down - found dead fish sadly and applied the spade as
recommended to the mass of roots the lilies had formed - I even found
homes for these. The pond was generally cleaned up and refilled. And
it did look so nice !

However yesterday I noticed that the remaining lily mass was no longer
part of the bottom of the pond but was floating at the surface. I
won't recount my efforts to get this blob of vegetable matter to sink
again, suffice to say that in the end I had to go and get my snorkel
and mask from the attic!! And having cleaned the pond at the beginning
of the week and it did look so nice, I of course stirred up all the
crud that was in the root ball, etc, so this morning was spent pumping
it all out again and refilling it with fresh water.

So if you do go in to trim your water lily make sure that you don't
remove in the process what is holding it down - at least if you do,
make sure that the boulder you put on top of it stays where you want it
to stay such that the blasted plant doesn't come back up again !

Rob