I also use crushed walnut purchased at PetSmart as reptile cage liner. 20 pounds in a big bag last a long time.
I use a liquid polish in this media as well as a small square of used laundry softener sheet to pick up the dust.
The case in the middle should work fine... Marc
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 Igitur si vis pacem, para bellum -
- Therefore if you want peace, prepare for war.
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