The Reef Octopus Regal 250 EXT is an advanced recirculating protein skimmer designed for saltwater reef aquariums. It efficiently removes organic waste and impurities from the water column, ensuring optimal water quality and a healthy environment for marine life. Its recirculating design allows for extended contact time between air and water, maximizing nutrient export and maintaining pristine conditions in your reef system. This high-performance skimmer is powered by a Reef Octopus 35V VarioS-6S Controllable Recirculating Pump, offering 5 energy-saving power settings and two integrated pause/feed modes (15 or 60 minutes). It features solid cast acrylic construction, a compact footprint of 18.1″ x 15.3″, a 10″ reaction chamber, and a height of 26.4″. Advanced control options include a detachable controller with a waterproof union, a safety float switch, 0-10v input for third-party controllers, and integrated memory. Skimmer drains are included for easy cleaning. The Regal 250 EXT is ideal for serious reef aquarists seeking superior water clarity and robust nutrient export in systems up to 600 gallons (light bioload), 500 gallons (medium bioload), or 300 gallons (heavy bioload). Its advanced control features, small footprint, and high-performance VarioS pump make it perfect for those who demand precision, efficiency, and space-saving design in their sump setup, ensuring a thriving and stable reef environment.