Fiji-20, Fiji-24 and Fiji-30 Advanced Reef Sump Features Fiji Cube Advanced Reef Sump is your great sump option due to its elegant design and unique features. All Fiji Cube sumps come with great features such as a full top support brace to prevent bowing overtime from the humidity and water pressure. Additional features such as interchangeable filter socks or filter floss holder allow you to choose your preferred mechanical filtration. The corners of the sump are also rounded for robust strength resistance. The sumps were designed with large equipment room (protein skimmer and reactor) to maximize equipment potential and refugium ready in mind to maximize absorption like ammonia, phosphorus, and other unwanted nutrients. To complement this great sump for your aquariums, all Fiji Cube sumps come with polycarbonate covers to reduce noise and evaporation from sump operation. The sumps are made with high quality full cast acrylic with full top support brace to further reinforce the mechanical structure for long term use (Fiji-24 shown). With the new design of the interchange mechanical filtration, you now can have the option of floss or sock filter. These sumps come with the holders to maximize the conveniences. Water level in the sump is adjustable from 5” to 12”. The feature is to accommodate for the water height requirements for different protein skimmers and user needs. The sumps comes with refugium compartment to cultivate copepods for healthier fishes and reduce nutrients for better water quality. The compartment can also be used for smaller equipment such as media reactor, refugium/algae reactor, fish segregation and coral growth compartment (Fiji-24 shown). Water from display tank is drained to a dedicated compartment before mechanical filtration to achieve quiet operation (Fiji-24 shown). Polycarbonate Sump cover / lid included to minimize water evaporation and reduce salt creep. Specifications