Up for sale is a set of 3 Quiet One 2200 Pro pumps. (These ones here.) $75 for all three, shipped. Pickup is available to save a few bucks. One was internal in sump, used to pump out saltwater as part of water change system; one was external to pump new saltwater into system as part of water change system; and one was external, to pump fresh water into system as part of ATO.