The Regal 150INT Protein Skimmer by Reef Octopus is a cutting-edge innovation designed with high-quality cast acrylic for durable construction. This advanced skimmer is ideal for aquariums up to 211 gallons, with no limits on sump space. Its hybrid conical body naturally concentrates organic-rich foam for efficient filtration. The skimmer is equipped with the newest Octopus controllable DC VarioS-2S pinwheel pump, featuring variable speed technology for precise control over air and water flow rates. With a recommended sump water height of 7-8.7 inches and a reliable 24V power source, this skimmer is perfect for achieving optimal aquarium conditions. Its solid cast acrylic construction ensures durability and high-performance results.