I have a ATB 1050 Skimmer I purchased about a month and half ago that turned out to big for my plans. Its rated to a true 530gal tank. I have $700 into it asking $650. Comes with a new impeller and new one installed worth $120 each and a new venturi. Pm with questions.
http://www.atbproteinskimmers.com/product-p/atb1050.htm
http://www.atbproteinskimmers.com/product-p/atb1050.htm