I'll take some tonight after work...Pretty simple setup...a larger staghorn type coral rock (pre-packaged kind from PetCo) on a South Down sand bead with lots of shells. The mantis like to burrow under the shells for dens (I'd read that when I set it up, and it's true). There are enough faces on the staghorn rock that the crabs let each other alone. I have a small bubble filter attached to an airpump to provide gas exchange and minor filtration, although it doesn't really need it.