My pond was created about 12 yesrs ago out of a V1 bomb crater (see photo album) and for some years had a beautiful crop of lillies and lush growth of bullrushes around the edges. In the last three to four years the lillies have disappeared and the bullrushes receded. The only difference I can see between then and now is that we have many more ducks, and I wondered if either their presence could be making a difference to the water quality or they are eating everything underwater before it gets to the surface
Any thoughts?
Any thoughts?