I am just starting up my tank and put in my base rock in a couple of days ago. I have a ton of tiny microbubbles with a couple of occasional larger bubbles coming up from the rock. I am assuming that this is just coming from the air trapped on the bottom side of the rock but figured that it would have slowed down by now, is hasnt. Is this something I should be worried about and how long do you think it will last. The base rock is Marcos rock which is very pourous so I guess it will last a long time since there are so many places for air to be trapped.