On Jul 3, 8:14*pm, songbird wrote:
Higgs Boson wrote:
Bill who puttputts:
Vermiculite ?

That, too. *I was never clear on the diff. between them, other than
perlite is white and vermiculite is gray. /?

* i think vermiculite is a processed
mica product (which used to be noted
as containing traces of asbestos).
i don't know if they've changed the
sources/process in recent years to
take care of that concern or not so
best to look into it if you use a lot
of it and are breathing the dust.

* also for perlite as silicon dust
isn't the best for the lungs either.

* songbird

Very helpful, tx. Will check it out.

HB