The RK2 5AC Protein Skimmer is a commercial-grade foam fractionator engineered for saltwater aquariums and aquaculture systems. It effectively removes organic waste and impurities from the water column, significantly enhancing water quality and clarity essential for thriving marine environments, from advanced home hobby setups to professional facilities. Utilizing a true counter-current design, it ensures efficient and thorough waste extraction. This updated model boasts 1.5-inch venturi plumbing and a 1.5-inch injector, which allows for increased airflow and superior skimming performance. It is powered by a robust 1/8 HP injector pump, providing consistent and powerful operation while remarkably maintaining power consumption comparable to a Vectra L2 pump. The unit further incorporates both internal and external washdown systems, simplifying collection cup cleaning and overall maintenance. Designed for aquarium professionals, dedicated home hobbyists, and aquaculture operations, this skimmer is ideal for anyone seeking a durable and exceptionally high-performing waste removal solution. Built upon nearly 30 years of engineering expertise, its robust construction and scientifically proven counter-current design guarantee reliability and superior water purification, making it suitable for even the most demanding applications where consistent water quality is paramount.