<a href=showthread.php?s=&postid=7533415#post7533415 target=_blank>Originally posted</a> by Flusher Any mantis that only grows to 4" or less should be okay in a 5.5 gallon tank. Glass thickness might be a problem with some of the smashers, though...
5.5" glass? that's pretty thin.
A G. chiraga could, as could a smaller peacock.
As far as the 1 gallon tank, do NOT do it. I killed my beautiful little G. glabrous (And she was one of the most interactive mantis that I had seen, and I have 9/have had 11 at this point), keeing her in a 1/5, on hold for a larger tank. The salininty/other parameters have too much risk of tipping in something that small.
I have a small G. chiraga in a 5 hex, a 2.5" P. cilata in a hex 5, and 3 small ones in 6 gallon Eclipse. All are going to be moved to a multi-chambered 55 in the near future but you can do one in a 5.5, just stay away from G. chiraga.