It's actually not limestone at all.
I first read about Diatomaceous Earth in Hatcher's Notebook, where author
Julian Hatcher details how it was used as the stabilizing base for the
nitroglycerin in dynamite.
I've seen the bags of cellulose that are an alternative to DE, but
never tried it. One big problem is that at least here at the stores
I've seen it at in NJ it's priced at a significant premium to DE.
I also don't get the "it's biodegradable" part being an advantage.
I just backwash the DE out onto the lawn and it disperses
and disappears. DE is actually used in some cases as a
In short, DE works, is cheaper, is what the DE filter specs
call for, etc. About the only reason I can think of to try it
is that with DE I get a little bit of it that gets through the
filter somehow and after a few days becomes noticeable
on the white steps. That might also be because the
filter is now 5+ years old and due for replacement soon.
But I wondered if the cellulose would be better in that
On Thu, 12 May 2011 06:31:25 -0700 (PDT), " firstname.lastname@example.org"
You've probably got a hole worn thru one or more of your filter grid
fabric. Mine went over 15 years before holes started wearing thru.
The replacements don't seem to last nearly as long, maybe 5 years. The
fabric is pretty much the only thing that can wear out other then the
plastic supports breaking.
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