I've got two pumps I'd like to get rid of. One is a PCX-40; its not perfectly quiet as it should be so I suspect maybe the impeller is unbalanced or maybe it needs new bearings. In any case its great for a mixing vat. The other is a Sequence 1000SEQ22. Its a BEAST of a pump, rated at 5000GPH with 1 1/2" fittings. This was the heart of my old 140g tank years back on the closed loop.