The Reef Octopus Regal Spacesaver DC Skimmer 300 EXT is a high-performance recirculating protein skimmer designed to efficiently remove organic waste from saltwater reef aquariums. Engineered for serious hobbyists, this robust filtration device is capable of maintaining pristine water quality in systems ranging from 500 gallons with a heavy bioload up to 700 gallons with a light bioload, ensuring a healthy and stable environment for your aquatic inhabitants. Central to its operation is the powerful and energy-efficient Reef Octopus 36V VarioS Controllable Pinwheel Pump, offering five distinct power settings for precise tuning. The advanced controller features multiple feed pause modes (15 or 60 minutes), a crucial safety float switch, and a 0-10v input for seamless integration with third-party aquarium controllers. Constructed from solid cast acrylic, this skimmer boasts a compact footprint of 20 by 17.5 inches and a height of 28.4 inches, making it a space-saving solution for sumps, while integrated memory and convenient skimmer drains enhance usability and maintenance. This skimmer is an ideal choice for dedicated reef keepers managing large, established systems who demand superior filtration, precise control, and reliable performance. Its compact 'Spacesaver' design appeals to those with limited sump real estate, while the VarioS pump and comprehensive controller provide unparalleled customization and safety features. Investing in the Regal Spacesaver 300 EXT ensures long-term water quality and a thriving reef ecosystem with minimal effort.