Leave it. I dosed pods in when I started the aquarium and left it alone for about 2-ish years. I also made sure there were parts of the rock structure that the mandarin couldnt get too, so that the pods have a safe haven to reproduce. Aside from that, just wait a while so that the pod population can grow.I'm starting a 29g biocube here in the next few months and would like to keep a single clown and a mandarin. What would you say is the biggest factor to your pod success in such a small tank?