My tank is a little over 2 years old at this point.... Purchased my live rock at my local lfs.... along with "bagged" live sand... and initially, filled my tank with some "ocean water"... I've kind of wondered about all of this - because I've never had copepods - ????? I have looked - during the day and at night as well with the lights off.... Still nothing! In fact, the only "hitchiker" I have ever discovered is the asterina star that was only spotted recently (and yes, initially I misidentified him as a baby choc chip)!!! Only having a 55 gallon tank - I again want to avoid the high shipping fees for one item... I have continually asked my lfs if they would consider "stocking" copepods - figuring that I would always have a food resource even if I couldn't maintain a copepod population... I mean after all, they do sell mandarins!! But their reply has always been that there isn't enough of a demand along with their experience with mandarins has been that they adapt to frozen foods... ???!!!??? (After reading on this site and doing other research as well, I don't believe that is true... What I think happens is that the lfs doesn't have the mandarins for any length of time, and so they don't experience the deaths... Although I do have to admit, that in their "showcase" tank there is one really healthy Green Mandarin!!! BEAUTIFUL is the more accurate wording! Large and chubby! But this is in a tank that has been established for several years - stocked heavily with live rock and fish that are not for sale....) Considering that copepods are offered in bottles, etc. that is why I asked if copepods are "live" items or not.... ????? ....