The RK2 XFLO 6-3.5 is a professional-grade, venturi-driven protein fractionator designed to bring commercial-level performance to the home aquarium. Drawing from over 25 years of industry leadership in public aquariums and aquaculture, this skimmer prioritizes performance, reliability, and durability to efficiently remove dissolved organic compounds from your system. It is engineered to maintain pristine water quality, ensuring a stable and healthy environment for even the most demanding marine life.

This model features a uniform 6-inch diameter reaction chamber, which maximizes contact time and flow rates for superior waste removal compared to cone or hourglass designs. Its counter-current flow technology sends water from the top down through rising air bubbles, creating a powerful stripping action for enhanced efficiency. Designed for systems between 400 and 700 gallons, the skimmer has a 9-inch by 9-inch footprint and stands 29.25 inches tall. Please note that this unit does not include a pump, which must be purchased separately; recommended pumps include the Sicce Syncra 5.0 or Ecotech Marine Vectra M1 for optimal performance.

The XFLO 6-3.5 is built for the serious aquarist who values proven technology and robust performance over cosmetic features. It is the ideal choice for hobbyists with large reef tanks who refuse to compromise on water quality and want to employ the same trusted equipment used by professionals. If you seek a durable, no-nonsense skimmer that delivers consistent, powerful results for a large-scale system, this industry-standard fractionator is the definitive solution.