I have been considering that very thing
by putting in quite a it the top pumice holds the bottem pumice under the
water line.
water penetration is the biggy you are right there
my only thought so far has been to crush it up to increase surface area
how much tho remains something I do not know
somehow somewhere there lies a chance it may yet prove to be more than a
fruitless endevour tho
Muhahahahahahahaha!!!

or I could just choke me sump of surface area
either way..... it uh, keeps me off the streets or somehting



"Wayne Sallee" wrote in message
nk.net...
Keep in mind that the pumice floats because it holds air. If it holds air,
then water can't get in, and if water can't get in, it cannot denitrify. I
don't think it's totally impenetrable to water, but you might want to
decide, just how much water is actually getting in.

Wayne Sallee
Wayne's Pets


swarvegorilla wrote on 2/26/2007 11:20 PM:
As a sidenote I have been experimenting with a layer of floating pumice
in a
sump
I picked up the pumice stone still wet from the ocean
judgeing by the barnacals it had been out to sea for quite some time
the structure of the stone is such that it should hold lots of nitrate
eating bacteria
well thats me theory anyway