Fiji Cube Low Profile External Overflow Box 2000GPHThe external overflow box is a popular overflow option for hobbyist to build their tanks into the next level. Fiji Cubes external overflow box features a slim and safe design that offers another solution to perform your tank build. Features: Slim and compact design to suit any aquarium set ups Works with rimless, eurobrace, and standard trim aquarium tanks (if desired, the rimmed tank may need additional gasket(s) to move high water level, additional