Someone, on this site I think, said they use Zilla Brand Lizard Litter in their tumbler to clean brass. Has anyone out there had experience with it? And how does it compare to other media, walnut or corn cob for example. I looked at the Zilla web site and saw a litter made from Aspen. Is that the one to use? I'll appreciate any info you can provide. I now use corn cab media and it works OK, but always willing to try something that may work better.