The mantis was small, about an inch inch and a hlf. I saw it eating a snail, hiding in a hole in a piece of live rock.. I took the rock out, and put it in a 10 gal i had just set up. The mantis came out of the rock after a day, and i took the rock out really quick. now it is in a 10 gal with nothing else in it.
I have had the female for about 6 mo, and the little male for about 5 months. they get along really well, and stay in thier little mushroom together. the male is about an inch long.