The RK2 Systems RK75PE Protein Fractionator is a high-performance water purification device designed for large-scale saltwater aquariums and aquaculture systems. It operates on the principle of foam fractionation to effectively remove dissolved organic compounds, proteins, and other waste materials before they can break down into harmful substances. By injecting fine air bubbles through a venturi system into a counter-current water flow, the skimmer creates a dense foam that traps waste particles. This foam rises and is collected in a dedicated cup, which then exports the concentrated waste, or 'skimmate', from the system, resulting in significantly improved water clarity and quality.

Constructed for durability and maximum efficiency, the RK75PE features a molded HDPE reaction chamber, a tuned Mazzei® venturi pump with Kynar® injectors, and an included automated wash-down system to keep the collection neck clean. All components are of the highest quality, utilizing USA-made MDM® pumps and Spears® piping and fittings to ensure long-term reliability. The unit also includes an ozone gas connection port for enhanced sterilization, air flow meters for precise tuning, a clear sight gauge for easy monitoring, and a screw-top lid for convenient access and maintenance.

This protein fractionator is engineered for the serious aquarist, commercial operations, or public aquarium exhibits that demand uncompromising performance and automation. Its robust build and advanced features are ideal for maintaining pristine water conditions in very large, heavily stocked marine environments. The RK75PE is the perfect solution for professionals and dedicated hobbyists who require a reliable, efficient, and low-maintenance filtration centerpiece for their most demanding aquatic systems.