i agree with nutfarm on this one...any of the Lysmata shrimp ought to be fine together...but, if you go for peppermint shrimp (which I think is a fine choice!) make sure you don't accidentally get camel shrimp. it is fairly easy to tell them apart if you know what they both look like, but a lot of LFS will label camels as peppermint. the most telling feature is of course the hump, the camel also will have eyes which project from the body; the striping pattern is somewhat different as well