On Tue, 02 Aug 2005 14:47:39 -0700, JGW wrote:

I have read that it's impossible to keep the
pond clean with rocks on the bottom, and that they can trap hydrogen
sulfide gas.

What are your thoughts?

I have been considering this as one possible solution: Has anyone
tried, or know of anyone who has tried using a *well-controlled*
water-blast wand, (using pressurized pond water), to roil up any
settled mulm around the rocks, which would then be pulled out through
the bottom drain? This would only be done perhaps once or twice a
year, and would of course be expected to temporarily load up the
filters, etc. But it seems that this might be one way to permit one
to rock the bottom. Any opinions, thoughts?