Just moved back to Calgary

[KennyKen]

So i have just been able to set up my nano last night, and if you cant tell this is my first setup.
Im just curious about a few things, should i remove the media in the fuge and replaces them with LR rubble or LS to make it an authentic fuge? there is a sponge, carbon and ceramic rings.
Also, my airpump has 2 outputs for hoses, but it only came with one hose from the pump to the skimmer, should the second output be plugged?

Thanks for any input you can give.