Yes I think they are hardy. I have 2 and I like them alot. They are nocturnal so you wont see them out too much but they really add color and everybody likes them. I actually hand feed mine silver sides, actually all my shrimp(3skunk and 2fire)
Josh
I used to see mine when I had them in my reef, but then again I had about 20 of them in there. They like to hang out under ledges so if you have ledges in your rock work you will see them more often.