Eshopps' reef sumps are designed with simplicity and are highly affordable for reef and saltwater aquarium hobbyists. Eshopps' Reef Sumps features sufficient, usable sump area to accommodate skimmers, pumps, and other additional aquarium devices. It also features a prefilter sponge to keep debris and air bubbles from getting into the pump. The open-top design allows easy access for convenient equipment maintenance. Includes square foam, 1in bulkhead, 3 ft. x 1-1/4in flex hose, and 200 micron bag.