wow, that's a HUGE skimmer! Must have been from the 180? That thing looks like it holds the majority of the water volume in the sump.
Ya, that's the one that I had on my 180. It's an MSX 250. Prett beafy for the 50, but you can see the collection cup, and that's only about 2-3 days worth. It barley fits in the sump...quite funny to see!