@seanardoin 

The other two pods are automatically configured so all you should need to do is to power on the other Deco units and the app will say the Decos joined. Plug in the third Deco unit, and after a couple of minutes look at the LED light. If it is green then it is already set up. If it is pulsating blue then try and add the Deco at that point. If the LED light is just stuck or blinking amber then try to reset (hold reset for 2 seconds) the Deco as it is on recovery mode.