[well, then it depends on what lights they were in before... if they were in strong lights such as mh, then they need to be moved up.. if they are in similar lights, then they're probably stressed..
do the zos look slimy or are they plump and juicy? some zos might just need to take a while to adjust.
keep them in low flow areas, don't touch them if you can, they should be able to adjust to the new environment.
there's really no telling on how long it'll take, but if they don't look slimy, small, then they should survive. just don't bother them and stress them out more]
