I'm adding an additional filter to my pond. I have a 3 foot gap between it
and the pond and am contemplating various ways of spanning the distance. A
rubber lined rock course might be an option. I really don't like the thought
of PVC pipe. I was thinking about making a trough using corrugated
galvanized metal - that stuff that's so popular on the roofs of barns and
tool sheds. Does anyone know if GALVANIZED metal is fish safe?

T. Wardell
Dallas, TX