"Andrew Burgess" wrote in message
...
~ jan JJsPond.us writes:

why leave out the rock? should I use gravel instead? I like the look
of the rock
Roger

You can never get all the crud out that rock collects, if you must have
it,
only have one layer, imo. ~ jan

Since koi like to root around I added black aquarium gravel to my pond
when
I built it. Nothing collects in it because it is scrubbed in each koi's
mouth at least daily :-)
snip

How deep is your layer of rock? What you are saying seems to fly in the face
of what a lot of PORG'ers preach. I am curious about your results.

BV.