I use sand. I feed in separate containers, so there is no sand ingestion/impaction issue. Aside from the snakes getting dusty every now and then, it looks and works great.
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Diego
SNAKES
4.3.0 Corn Snakes (Different morphs)
1.1.0 Everglades Rat Snakes
1.0.0 Baird's Rat Snake
1.2.0 Trans-Pecos Rat Snake
0.1.0 Amel Pacific Gopher Snake
1.0.0 Het Amel San Diego Gopher Snake
2.1.0 Sonoran Gopher Snake
0.1.0 Amel Sonoran Gopher Snake
1.0.0 Mexican Black Kingsnake
2.1.0 Gray Banded Kingsnakes (1.1 River Road, 1.0 Non-Locale Specific)
0.2.0 California Kingsnakes
0.1.0 Thayeri Kingsnake
0.1.0 Florida Kingsnake
1.0.0 Boa Constrictor
0.1.0 Dumeril's Boa
1.1.0 Rosy Boas (Mexican & Mid Baja)
1.1.0 Kenyan Sand Boas
0.1.0 Indonesian Dwarf Pacific Boa
0.1.0 Tangerine Honduran Milksnake
1.0.0 Honduran Milksnake
1.2.0 Ball Pythons
1.0.0 Woma Python
1.1.0 Cape York Spotted Pythons
1.1.0 Macklot's Pythons
1.0.0 Western Hognose
0.1.0 Blacktail Cribo
LIZARDS
1.0.0 Frilled Dragon
3.1.0 Bearded Dragons (2 Normal, 1 RedXGold, 1 Citrus)
0.1.0 Eastern Collared Lizard
0.1.0 Merauke Blue Tongue Skink
1.3.0 Leopard Geckos
1.0.1 Yellow Niger Uromastyx
1.1.0 Chuckwalla
0.1.0 Banded Gecko
FROGS
2.2.0 Southern Bell Frogs
1.0.0 Green Tree Frogs
1.0.0 Bubbling Kassina
1.1.1 White's Tree Frogs