I read Shrimp could molt after being put in a new tank (brought on by stress). My cleaners molted the second day in the tank, and quite frequently for a month after... On most shrimp the molt will look "exactly" like the original, complete with antennaes<sp, (to fool preditors), and the live ones will hide for a few days thereafter, toughening up their new bodies. My peps spend most of their time (during daylight hours) hanging upside down and swaying. They are pretty active at night though, cruising around the whole tank.
b.