http://www.ocreef.com/bubble_magus_bm-160e
I had it set up to run externally, but also can be used to run internally. It's a few years old but still worked fine. Sells on the site for $695. Asking $150
Needlewheel protein skimmer
BM-160E
Capability : 1000L-1500L(265G-400G)
pump:EHEIM 1260
Pump power: 38W, 220V 50Hz /110V 60Hz
air intake : 960L/H
Dimensions: 230*280*630 MM(9.1" * 11.1" * 24.8")
cylinder: 8"
