The Aquaforest AF90 Media Reactor was designed to provide the most efficient filtration in even the most demanding saltwater aquariums. With its high-quality universal fluidization filter, you can choose between a wide-variety of filtration media options to suit your individual aquarium needs. The AF90 will work with activated carbon, phosphate adsorbents, and zeolites from any manufacturer; however, Aquaforest strongly recommends using their optimized mix of Aquaforest filtration media: AF Carbon, Phosphate Minus, and Zeo Mix. Smart-twist opening for simple media replacement Fully leak-proof-- can be placed inside or outside sump Adjustable sieve height Resistant to scratches and discoloration Hose ends and internal sponges included The AF90 features a versatile leak-proof design that can be placed either in the sump chamber or outside the aquarium when sump space is limited. Its ergonomic body and smart-twist system makes for easy and efficient media replacement with whichever location you choose. Internal sponges are also included to prevent filter media from entering your system. Specifications Capacity - 1300mL (44 fl. oz.) Height - 31cm (12.2") Base Diameter - 13cm (5.1") Acrylic Tube Diameter - 90mm (3.5") Connectors Diameter - 16mm (5/8")