The Reef Octopus eSsence S-130 Protein Skimmer was designed for the modern-day aquarist in mind. This remarkably compact in-sump protein skimmer is capable of skimming aquariums up to 160 gallons where sump space may be limited. \nBioload Handling \nThe bioload of an aquarium refers to its ability to process waste in proportion to tank volume. Protein skimmers work best when properly matched with the bioload of the system. \n(EXCLUDING SUMP) \n\n\nHeavy\nMedium\nLight\n\n\n\n75 gallons\n120 gallons\n160 gallons\n\neSsence S-130 Features \n\nSmall Footprint - BIG Performance\nRELIABLE Reef Octopus Aquatrance 1800s Skimmer Pump\nDome Bubble Chamber for EXTENDED Dwell Time\nUp to 12% QUIETER with Integrated Removable Silencer Collar\nDisassembles Easily for Service & Cleaning\n11 Watts of Quiet and Energy EFFICIENT Operation\n360° Submerged Water Output Provides a QUIET and SPLASH-FREE Discharge\nTwist & Lift Collection Cup for EASY Waste Maintenance\nCalibrated Click Dial Water Output Adjustment - No More Second Guessing your Setting\nQuick Release Tabs Makes Accessing the Pump a SIMPLE Task\n\nEfficient Performance \nAt the core of the skimmer, we have the reliable and extremely efficient Reef Octopus Aquatrance 1800s pinwheel pump. Reef Octopus was the first protein skimmer manufacturer in the world that designs and produces our own skimmer pumps. Aquatrance skimmer pumps have been specifically engineered to enhance and increase the efficiency of our protein skimmers. \nEase of Use \nRemoval of the collection cup could not be more simple with the Twist & Lift connection which doubles as a detachable air silencer. A calibrated 16 step water level adjustment dial takes the second-guessing on your skimmer's setting. \nSimple to Maintain \nConstructed of high-quality molded parts that completely disassembled for easy cleaning. No hard to manage screws here, the quick-release tabs make access to the inner body a breeze.  \nQuiet Operation \nThe skimmers' unique 360 submerged output disperses water back into the sump without turbulence providing a quiet splash-free discharge. The detachable silencer collar is 12% quieter than standard silencers. \nInternal model