Running what came with it. Bottom is the eheim noodles, then a course pad, then the eheim smaller media, the a fine pad.........it's filled too! I like the amount of flow, I don't see it as a problem........ I am impressed! It's moving all the debris to my AQ 110 on the other side.......It's aimed toward the top so there isn't too much current in the tank..........just nice aeration on top.