The Reef Octopus Classic 152-S Protein Skimmer is an essential piece of equipment designed to maintain pristine water quality in saltwater reef aquariums. It effectively removes dissolved organic compounds and waste products from the water column before they can break down and degrade the aquatic environment, helping to prevent nuisance algae and maintain stable parameters for sensitive corals and fish. This in-sump skimmer utilizes a powerful pinwheel pump to create a dense foam of micro-bubbles, which then collect and export organic pollutants. Engineered for efficient performance, the Classic 152-S features a distinctive super cone body design, measuring 6 to 3.5 inches, with a compact footprint of 10.4 by 8.1 inches and a total height of 20.7 inches. It is powered by the reliable Reef Octopus Aquatrance 1800s Pinwheel Pump, which consumes only 11 watts while achieving an impressive air draw of 480-511 lph and a water draw of 140 gph. For optimal operation, the manufacturer recommends a sump water height between 6.5 and 8 inches. This protein skimmer is an excellent choice for reef hobbyists seeking a robust and energy-efficient solution for their marine aquarium filtration needs. Its thoughtful design and proven performance make it suitable for maintaining healthy conditions in a variety of reef tank setups, ensuring a cleaner and more stable environment for all inhabitants. The Classic 152-S provides dependable waste removal, contributing significantly to the overall success and beauty of a vibrant saltwater ecosystem.