We are with the no rocks cohort. They don't give you all that much
surface as compared to plant roots. Easy clean bottom is overwhelmingly
best.
Jim
JGW wrote:
We're getting ready to build our new pond. The contractor wants to
line the walls and bottom with rocks, which he says will serve as a
great huge biofilter. 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?
Thanks.
Joan
___________________