The Eshopps RS-75 Reef Sump is designed for the modern saltwater and reef aquarium hobbyist, and is rated for aquariums up to 75 gallons. The Eshopps Reef Sump is a perfect choice for "Berlin" style filtration systems and features a large capacity open top design, built in holder for the included 4" 200 micron prefilter sock, and a built in baffle with a foam block between the open sump and return pump chamber for bubble removal.  The large open sump area has plenty of space for equipment like proteins skimmers or media reactors.  The Sump inludes a 3' flexible drain hose, ready to connect to your drilled aquarium, or Hang-On overflow box.

Eshopps Reef Sumps can also be used for adding water volume, or space for additional equipment, protein skimmers, refugiums, uv sterilizers etc..  to an existing filtration system.  photo may not be exact!