Hi Dustin,

Welcome! You will probably get lots of opinions on how much rock you need. 1/2 to 1lb per gallon is a common guesstimate. I recommend that you think about what shape or scene you want to create and choose your rock accordingly. This in retrospect seems to me a better solution than just getting X number of pounds. You should also seek input from Mike (technoshaman) as he keeps at least one Nano, and always has good advice.

You have already started well by researching things and asking questions. Best of luck with your new tank.

-Ed