The Reef Sump is designed with the unique requirements of saltwater and
reef aquariums in mind. Each large capacity sump includes a cover,
square foam, 1 in. bulkhead, 3 ft. of 1 in. flex hose, and a 300 micron
bag for excellent prefiltration. Plenty of sump space makes adding a
protein skimmer or other aquarium accessory simple and easy, while the
extra water capacity helps keep your main tank stable.