Having Copepods is a nice indicator that you have a nice balance in your artificial reef. Many fish including tangs enjoy them. Having a decent population means you can go on vacation and only feed pellets for the week.
Prior to going full Sps I always had a great population of pods. Need a good sized fuge and to be a lil dirty to keep em' happy. I notice they thrive in people's tanks that have undersized skimmers and larger fish.