The Reef Octopus Regal 300 INT Protein Skimmer is an advanced in-sump filtration device engineered to meticulously remove organic waste and dissolved impurities from large saltwater aquariums. Utilizing a high-performance VarioS-6S controllable pinwheel pump, it generates a dense, stable foam head that efficiently separates protein compounds and other detritus from the water column, ensuring superior water clarity and fostering a pristine, healthy reef environment. This robust skimmer features solid cast acrylic construction, built for durability and longevity, with a footprint of 18" x 12.2" and a height of 25.4". It is powered by a safe and efficient 36V system, offering five controllable energy-saving power settings for optimal performance. The state-of-the-art detachable controller includes multiple pause/feed modes (15 or 60 minutes), an essential safety float switch, and a 0-10v input for seamless integration with third-party aquarium controllers, all supported by integrated memory. The Regal 300 INT is designed for discerning reef aquarists maintaining substantial systems, effectively handling heavy bioloads up to 500 gallons, medium bioloads up to 600 gallons, and light bioloads up to 700 gallons. Its precise controllability, powerful skimming capabilities, and advanced safety features make it an ideal choice for serious hobbyists who demand exceptional water quality and reliable performance for their large to extra-large reef tanks.