The Reef Octopus Classic 152S Protein Skimmer provides sophisticated and efficient filtration for saltwater aquariums up to 150 gallons. This in-sump skimmer utilizes a unique Super Cone body design and is powered by an ultra-efficient Aqua-trance 1800s pinwheel pump, ensuring quiet operation and superior organic waste removal to maintain pristine water quality. Constructed from high-quality cast acrylic, the skimmer features a "wine glass shape" Super Cone body that naturally stabilizes and concentrates foam for enhanced collection. Its compact footprint of 10.4 inches by 8.1 inches and total height of 20.7 inches make it suitable for various sumps, while the entire unit disassembles completely for effortless cleaning and maintenance. The Aqua-trance 1800s pump consumes only 11 watts and draws an impressive 480-511 lph of air. Ideal for aquarists seeking reliable performance at an accessible cost, the Classic 152S efficiently handles heavy bio-loads in 80-gallon tanks, medium bio-loads in 100-gallon tanks, and light bio-loads in 150-gallon systems. For optimal function, the recommended sump water height is between 6.5 and 8 inches, providing precision control and bubble-free output for a healthy reef environment.