I was just wondering, how much LR do you have in your nano? I have 17 LB in my my 8 gallon oceanic biocube. 10lb in the DT and 7 lb in the 3 back chambers. So, it all equals to 17 lb in the entire system.
i removed all the bio-media (the white doughnuts) in the back and used rubble rock instead. its just live rock that i put in a bag and threw on the driveway a few times. you can also buy rubble rock from many LFS for cheaper than a whole rock.