It may just be me and something weird about my tank, but I've now had 3 Blue Reef Chromis die in my main tank and 3 in QT (in the 9 months my tank has been up).
Everything I've read says that they are nice and hardy, but I haven't had any luck. I currently have 3 in my display tank (They are MUCH bigger than previous ones) so I'm hoping they will do better. If not I'll be avoiding these beautiful little fish in the future.
I've got a school (6) Blue Green Chromis that have done great in my tank, along with my other fish, so no idea why just this particular species is dying on me.