Thanks to everyone for the advise. I rarely feed the fish because of the
amount of food in the pond for them. Lots of baby fish and organic material.
So I eliminated that. I clean the filter regularly and there is not much
muck on the bottom so I dropped the water level a couple of times and
refilled. The foam is almost gone now and so I overfilled the pond and let
the surface water drain for an hour or so. That seems to have licked the
problem.
I will pass on to the shop here what I did and they can pass it on to
others.

Thanks again


"RichToyBox" wrote in message
news:QLiVa.1597$uu5.508@sccrnsc04...
Some of the protein (DOC) can be removed by overflowing the pond as part
of
the water change. The protein makes something like an oil slick and due
to
its character, it causes the bubbles that you talk about.
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.html


"Lee Brouillet" wrote in message
...
It's probably DOC (Dissolved Organic Carbon), or the visible results of
overfeeding, perhaps the need to clean the pond or filters, etc. Water
changes can help; I also know people that have used food grade liquid
silicone to change the surface tension of the water so the foam goes
away.
This is a neat trick to use 2 hours before a house full of guests shows
up
and you want the pond to look its best, but the *best* way of taking
care
of
the problem is to, well: take care of the problem. Clean the
pond/filters
if
necessary, cut back on feeding and do some water changes. It's harmless,
but
unsightly.

Lee

"ba5416" wrote in message
ble.rogers.com...
I live about two hours north of Toronto Ont. I have a 3 yr old pond
about
a
1000 gallons or so. Healthy from the beginning. There are about 10
fish
in
there and I have had successfull breeding since the first year. The
deepest
part of the pond is about 46" deep and I leave the pump running
throughout
the winter as I leave the fish in year round. There is a fountain on
the
pump and a water fall at one end. The waterfall rock is limestone
that
I
collected from an old fence line.

My problem is this year I am getting foam buildup from the water fall.
Did
not have the problem last year but this year it is bad. Water tests
that
I
do indicate that everything is fine for all the important things like
PH,
nitrites, nitrates, hardness etc.

The local store is at a loss why the foam. They have done tests as
well
and
have not found anything bad. I have seen foam on rivers which says to
me
it
is something natural, but it looks terrible.

Any suggestions???