As Mike said, keep in mind that temp is important with these fish. You also need a very secure cover, no holes at all, or the fish will end up on the floor. In my limited experience, blue spots are a lot more active than pearly heads, but the downside is that they also seem to me to be more delicate. We had one that we lost to blue spot disease, we had to euthanize. Do watch out pairing them with very small animals, our guy ate a pistol shrimp about a month ago.
I'm already pushing my candycane pistols luck with a wrasse and hawkfish. That added with the lower temps I don't think I will go the way of a blue spot jawfish, even though its one of the most beautiful fish IMO.
Thanks for the info