I had read somewhere that you should acclimate caulerpa very slowly to keep it from breaking down and dissolving. Also that it was very sensitive to temp changes.
Do all caulerpa have basically the same requirements?
I aclimated my caulerpa for about a half hour before adding it the the refugium. I don't know if that was completely necessary, but what the heck, I had the time. I run the reverse daylight cycle myself (about 12 hours on/off), but some people run then 24/7.