http://weloveteaching.com/mypond/VF/veggie_filter.html
here is another, the one I had in my basement for a while
you can even build it in the pond .... just make it so the fish cannot jump in to eat
the veggies up. Ingrid

On Wed, 12 Mar 2008 08:52:48 CST, Gareee© wrote:
The built over pond veggie filter idea looks like a possibility.
I'll have to see about building something over the pond, and then populating
it with plants. Iris are doing well in the pond (some are actually still
green for the first time, even though we've had quite a few freezes) lillies
are doing well in the pond as well, as a few survivors from plant
aquirements.