they are capable to sting the nearby corals...
and the coral will be injured and some will take a long long time to recover or some may even die off...
then u gotta read up more and view reefer's tank thread more so that u have a clearer pic of sps and LPS and even soft corals...
anyway.....i live in cck area...
visit one of our sponsor irwana at pasir ris...definitely worth your trip there...
one of the most constant LFS that brings in sps and lps shipments...
is your LRs cured?....i remember when i first start up my 2ft tank, i only cycle the tank for 3 days then i place all my old corals back into the tank....no casualties...
but to be safe...run it for at least 1 week..