It was mentioned in this thread http://www.reefs.org/ubb/ultimatebb.php?ubb=get_topic&f=1&t=030505 and I checked the link and sure enough. Does anyone actually run a Sen 900 on this skimmer? Isn't that about 4-5 times the water flow of the stock pumps? Don't you need a venturi to introduce air? I'd love to get some feedback from anyone with experience with this combo.