X-FLO Protein Skimmers – By RK2
RK2 set the bar for protein skimmers in the public aquarium and aquaculture industries and has been the industry standard for over 25 years. Now you too can use what the professionals use! Let’s take a look at what makes the XFLO skimmer stand out from the ever varying protein skimmer designs in today’s market.
From materials, to research and testing, RK2’s XFLO skimmer was developed and designed with a higher standard in mind.
Materials
XFLO is made from the highest quality materials available. Our molded bases are made from High Density Polyethylene (HDPE) that doesn’t require gluing or bonding to fabricate.The reaction chamber is made from a single section of acrylic tube. The riser cone, collection cup, and collection cup lid are made from nearly non-breakable polycarbonate material and our Mazzei Air Injector (Venturi model only) is made from highly durable ozone resistant Kynar. This
guarantees it will not break down when exposed to ozone.
Extensive Testing and Research
XFLO has been tested and designed to run at specific levels of air injection. Don’t believe that the more air/bubbles you inject the better the skimmer will perform. The concept of increasing air flow while increasing contact times is scientifically impossible. Too much air, and the reaction chamber only fills with foam, which displaces water and decreases bubble contact time with “dirty” water, along with the true tank turnover rate.
Experience
RK2 Systems, Inc., the parent company of XFLO, has been the industry standard for over 25 years in the public aquarium/zoo sectors. We’ve taken their knowledge and applied it to making a protein skimmer designed for the home aquarium.
Made in the USA!
XFLO Skimmers are designed and manufactured in the USA with the highest-quality materials in the industry.
| XFLO Model | System Volume | Base Dimension | Height | Diameter |
| XF6-2.5 Venturi | 750-1500L | 23x23cm | 58.5cm | 15.25cm |
| XF6-3.5 | 1500-2650L | 23x23cm | 74.5cm | 15.25cm |
RK2 AC Series Foam Fractionators
Meet the newest models of RK2’s commercial foam fractionator lineup! Our AC series is designed for low flow rate applications while keeping the performance and quality that larger RK2 models have become known for. RK2’s nearly 30 years of engineering experience combined with the extensive R&D we are proud to offer a truly commercial grade foam fractionator for aquarium professionals, home hobbyists and aquaculture professionals alike. These units are built to withstand the most demanding applications. We utilize a design that is based on proven science and volume metrics to bring you the best performing fractionators available today.
Design
All RK2 fractionators utilize counter current design. This means incoming (dirty) water enters high on the reaction chamber or vessel. The incoming water then travels downward through the rising air, which is injected low inside the reaction chamber, before exiting the bottom of the reaction chamber. In comparison, a co-current designed model has it’s incoming water and air/water mixture entering at the same level inside the foam fractionator. Once inside the fractionator, both the incoming water and air/water mixture travel in the same direction, which offers little to no mixing and operates with a much shorter contact/dwell time.
Materials
The AC series is made from the highest quality materials available. Our molded bases are made from High Density Polyethylene (HDPE) that doesn’t require gluing or bonding to fabricate. The reaction chamber is made from a single section of acrylic tube. The riser cone, collection cup, and collection cup lid are made from nearly non-breakable polycarbonate material and our Mazzei Air Injector (Venturi model only) is made from highly durable ozone resistant Kynar. This guarantees it will not break down when exposed to ozone.
Efficiency
When coupled with the recommended L1/L2 Vectra pumps, our foam fractionators operate at approximately 1amp of power at 12VAC. Simply put, there is no reason to look anywhere else for your foam fractionator needs! Whether you are a hobbyist in need of a fractionator for your larger display tanks or an industry professional in the aquaculture or public exhibit sectors, the AC series fractionator by RK2 is your answer!
| RK2 Systems Model | Operating Flow Rate | Diameter | Base Dimensions | Height | System Capacity |
| RK5AC | 19-38LPM | 25.4cm | 30.5×30.5cm | 122cm | 3785-7570L |
| RK8AC | 49-98LPM | 25.4cm | 30.5×30.5cm | 152.5cm | 7570-15,140L |
| RK10AC | 57-114LPH | 25.4cm | 46×91.5cm | 195.5cm | 9460-22,710L |