Podhive is a 3Dreef exclusive design,its an cocepod/amphipod/zooplancton nursery..Its made of Reef safe PETG plastic.It consists of an external cage and an intricate core full of small tunels and plenthy of living hatching space as seen in the video..Place it in your sump or refugium and let it do his job..ocasionaly as a treat to your fishes you can shake in the main aquarium to release pods and fish will eat them.it works best in pairs so you can harvest one and let the other as a seed. choose any colour mix presented in the photos..just leave a note at chekout with the pretended colour or colour mix