Its really slowed down bunches, I don't really have any bioload so the cup takes a long time to fill. The bubble stack is a thing of beauty though, like the head on a good microbrew. But darker tan.
My 75 didn't have a skimmer, so this may be a dumb question, but the more fish in the tank the more the thing will pull, correct? And why does the bubble stack disappear when I feed?