I've turned the airstone up and down and everything in between with NO change. Not 'its not going to what I want' but 'its not changing at all'. I would replace the discs, but I'm out and I don't know where to get more. I did try rinsing them out, but it didn't effect it.
When I say clean the filter I mean I made sure none of the airline was clogged and nothing had come loose. I love plastic dip too, all my aquariums are backed with it, but I don't mind the green of the filter.
My other 10 gallon's sponge filter is working perfectly, its only one that's misbehaving.