I generally make a test filter from each new batch to be sure. You can also
look for indications that it is allergy free or some such wording.
"Iain Miller" <donot.DeleteThis@spam.me> wrote in message
news:NlaUa.729$2o3.8634@newsfep4-glfd.server.ntli.net...
>
> "Paul Irwin" <irwinp.DeleteThis@indiana.edu> wrote in message
> news:bfp25k$c0n$1@hood.uits.indiana.edu...
> > I get mine from an upholstery shop. You might also try a craft store.
>
> Would that not be treated with some kind of fire suppressant chemical? I'd
> have thought it would be less than ideal but clearly its not killing your
> fish so it must be OK - interesting!
>
> I.
>
> >> Stay informed about: source of sponge material for DIY sponge filter