Algagen PODS™ Tisbe are benthic harpacticoid copepods (Tisbe sp.) that originate in subtropical waters. They come packaged in 8 oz. bags containing phytoplankton and a small piece of algae. They are detritivores that will thrive in and help seed your refugiums. Great when used to entice finicky eaters such as Dragonettes, Pipefish, and Seahorses.