I'm kinda lost as to where you have what LOL. Pods
are the tiny little creatures that grow in your refugium adn on your live rock. Very good to have, fish eat them and they help the overall health of the tank.
In my setup I have 3 compartments. The one on the left is where my overflow drops the water and my skimmer is, then theres a wall and baffle and my refugium is there, the third compartment is for my return pump.
Here's a crappy picture