The RK2 XFLO 6-2.5 Protein Fractionator is a professional-grade, venturi-driven protein skimmer engineered for superior organic waste removal in saltwater reef aquariums. Building on over 25 years of industry leadership in public aquariums and aquaculture, this robust unit is designed to deliver unparalleled performance, reliability, and durability, ensuring pristine water quality for demanding aquatic environments. This innovative protein skimmer features a uniform 6-inch diameter reaction chamber, optimized to ensure proper flow rates and extended contact times for maximum efficiency, unlike designs that may reduce performance. It employs a highly effective counter-current flow mechanism, stripping soluble organics with precision. The XFLO 6-2.5 is rated for systems between 200-400 gallons, stands 23 inches tall with a 9" x 9" base, and has a 6-inch diameter. Please note that this model is pump-driven and does not include a pump; recommended pumps include the Mag 9.5 Standard, Sicce Syncra 4.0, or Ecotech Marine Vectra M1. The RK2 XFLO 6-2.5 is ideally suited for serious reef aquarists and professionals who demand industrial-strength filtration and proven technology. It caters to those who prioritize long-term performance and robust construction over superficial aesthetics or unverified claims. Choosing this skimmer means investing in a piece of equipment trusted by experts, providing peace of mind and exceptional water clarity for your valuable marine ecosystem.