There are many things that you can put in there. Here are a few things that you could consider putting in:
-LR
-LS
-Chaetomorpha
-Any other type of Macro
-Pods
i never purchased any pods. what i did was get one handfull of macros from a few different sources- lfs, local reefers....
it wasn't long that my refugium looked like a mini jurassic park.