Classic In-Sump ProteinSkimmer As one of the Reef Octopus Classic Series skimmers, the in-sump styleClassic 200INTwill provide great performance for well-stocked aquariums up to 250 gallons. This Classic Skimmer is constructed of high quality cast acrylic and features an easy to adjust gate valve, a quick release neck for easy cup removal, cup drain, bubble diffuser, o-ring sealed union pump mount, air shreddingAquatrance 3000s pinwheel pumpand air silencer. Highlighting Features of the Classic Skimmer – Bubble Diffusing Chamber and Hybrid Cone Bodythat naturally reduces and stabilizes the foam production; This means less turbulence in the neck area and more contact time for organics to rise and collect – Oversized Air Silencerfor quiet operation and airline mount – Collection Cupwith flow directional guide, drain and unit venting – Precision Controlwith the easy to turn output flow valve – Efficient PowerThe Aquatrance 3000 pinwheel pump offers quiet operation and excellent performance. Bioload Handling The 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. (EXCLUDING SUMP) Heavy Medium Light 150 gal 200 gal 250 gal Classic 200INT Features High-Performance Venturi Air Injection System Reef Octopus Aquatrance 3000s Skimmer Pump Refined Hybrid (half cone) Skimmer Body Easy to Remove Cup with Drain Precision Water Level Control Output Valve Air Silencer Solid Acrylic Construction Quiet and Energy Efficient Operation Technical Specs Body Size:8inFootprint:14.6in x 10.25inNeck Size:4.75inTotal Height:24inOutput Size:50mm/1.5in PVCOutput Height:6.5in Recommended SumpWater Height: 7.5 – 8.5in Pump Information Reef Octopus Aquatrance 3000s Pinwheel PumpWattage: 35wAir Draw: 900lph / 31.5scfh*Water Draw: 800lph / 211gph**Air and water results will vary depending on aquarium setup