The foam is probably protein on the surface of the water which foams when it
is hit by waterfall or air stones. It is harmless, though somewhat
distracting. To remove the protein, overflow the pond washing the surface
with a garden hose to the overflow point, and a lot of it will be washed
over. If it is a lot of foam and it showed up all at once, that is a sign
of spawning and you need to keep an eye on the ammonia and nitrites and not
feed until they are back under control.
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.html
"2pods" wrote in message
...
I noticed today we seem to have what looks like foam.
Both free floating and hanging around the fountain spout, water lillies,
and
other plants.

The only thing I can think of is I decided to bring the outlet hose from
the
filter back in via a waterfall, and it's coming from the rocks and cobbles
?

Touch wood the fish seem OK so far.

Peter