Is there any benefit to using an air stone in the tank?

[Savas]

Other than circulation, is there a need to run an air pump into the tank. Do the bubbles add anything other than airation? Do reef tanks use them?

I do not like the look of the bubbles, but I now have a spare air pump from my freshwater tank that I could use for some low flow.

[amike5]

Not really. If you have a skimmer, that should be more than enough aeration.

[Savas]

I have three nano tanks and do not run a skimmer on any of them. I do 10% water changes weekly to compensate for the lack of a skimmer.