Mantis Shrimp tank

[Best Fish-Jake]

Currently setting up a 10 gal tank for a smasher mantis. I'll post pics on the rockwork (which will be readjusted by the mantis anway) when I get home. Any pointers on keeping these guys? I'm decently educated on their needs but I don't know many varieties that stay under 5" but still have a great personality like a peacock. All tips welcome!