Bubbles in sand? What is it?

"SA" wrote in message
...
Marc,

Thanks for the reply. I was hoping that they are nitrogen. My sand bed is
about 2 months old. I did use live sand however. Is that long enough you
think for anaerobic activity to start?


I would agree with Marc on this one. If there no algae or air pocket that
was trap, I would or can assumed it nitrogen gas that being release from the
sandbed. Critter that roam in the sand can release their own gas and get
trap in the sandbed too.

CapFusion,...