white smoke shooting out of my rocks??!!

[Iphantom]

I was watching my nano last night and white smoke shot out of one of my rocks then out of another

there are no fish in it

What chould be doing this/? sould I be worried?

-Matt

[adinsxq]

worms 'n stuff burrowing through your rock. kind of like you digging a hole and shoveling the dirt over your shoulder, but in this case.... out their back end.

[Iphantom]

oh ok....I was worried

thanks and thanks for the fast response

: )

-Matt