Already done Gary, The tank I am running now has a healthy pod population, though it is shrinking, I think the PJ cardinals are taking it out, and now that the bristle worms are starting to show up, the pods don't get as much food. As such, I have already set aside a small 10 gallon to act as a tank on it's own until this one comes up, I am going to populate it with pods, worms, mini-stars, macro algae, and so on, and just let all the micro flora and fauna grow.

Just like this tank, I will let the new one grow into itself for a few months before I even think of getting mandarins in there. I have also had good success in the main tank itself, by setting up a 'grunge' bed of rubble that the pods like to breed in, there is no way a fish larger than a clown goby could get into that 'bed' and in this tank, it should be sufficient to keep a pod population going in the main tank in addition to the one running in the fuge.