http://www.aqua-medic.com/turboflotor_5000.shtml
Priced at 1000$us on this site
http://www.allwatermeters.com/aqm-71004.html
T5000 Twin 6' (2 x OR3700) for aquaria up to 1250 gallons
works great but needs repair the part where the pump recirculates back into the skimmer is cracked i fixed this with silicone and pvc glue a couple of years ago, i took my tank down late last year and it has not been up and running since. both pumps still work but i would suspect it might need another silicone job or a repair by someone with more know how then I.
500$ obo
Pm Me
Richard