I have a brand new, still sealed in it's original box, Fluval FX6 Aquarium Filter available for sale. I bought it as a back up filter to 3 other ones that I had running on some of my aquariums. I have decided to downsize my fish keeping hobby, so I no longer need it. These Fluval FX6 filters are rated to pump 925 gallons an hour and are very highly rated. They're good for aquariums up to 400 gallons. I can attest to the high ratings! I never had any problems at all with the 3 that I ran and am still running and they have been running for years. They are also easy to maintain and are self priming. I have run these on tanks from 75 gallons to 135 gallons and they have worked very well for me. They normally run about $300 to $340, so this will be a good deal for someone. Thank you for looking!