just so ya know, when ordering from an online source other than TBS, the kind of mantis you'll get is completely up in the air. you might end up with an N. wnnerae which would be fine in a 10 gal. or you might get a fulll grown L. mac which you'd be completely unprepared for. *shrug* when it comes to mantids, i don't trust any source where i can't see what im getting exactly.
if it's a smasher, I don't see the point of adding fish as food. smashers generally don't bother attacking fish.