bare bottom?

[Boomboy]

i personally like the look of the sand, i wouldnt go deeper than 1" though, no reason in nanos, you just do water changes. its alot easier to do water changes on a nano then it is on a larger tank, where 10% is 1 gallon instead of 10, also if you have a larger tank, you make more water than needed and use the rest for the nano.