Red Sea RSK 900 Reefer Internal Protein Skimmer

Red Sea Reefer Internal Protein Skimmers are designed with the hobbyist needs in mind. From quiet rubber feet, a robust air silencer, and not to mention the FoamView window with built a built-in manual neck cleaner, all which are focused towards easier maintenance along with a quieter reef tank. Starting at the top, Red Sea's Reefer Skimmers now include a built-in neck cleaner that can be manually turned to remove any build-up from the walls of the neck, while the integrated FoamView window lets you see how the foam is collecting in the neck. Along with the included cup-drain tube, emptying the collection cup is only requires a turn of a valve, and is also super easy to connect to an external waste collector. Moving down, every Red Sea Reefer Skimmer includes a Sicce PSK pump for enhanced performance and reliability that pushes a balanced amount of air and water through the hydrodynamically efficient bubble diffuser setting them up for a turbulent free ride into the collection cup. 

  • Integrated Manual Neck Cleaner
  • High Flow Air Silencer
  • Simple to Maintain and Disassemble
  • Easy to Tune Water Level Control
  • Vibration Reducing Feet and Connectors
  • Includes Collection Cup Drain Line & Valve
  • Multiple Pump Orientations for Sumps with Tight Spaces

Red Sea Recommends for tanks up to:
Light Bioload - 740 gallons
Medium Bioload - 500 gallons
Heavy Bioload (most common) - 240 gallons
Footprint* - 11.4" x 10.6" or 12.6" x 9.4"
Height - 23"
Recommended Water Height - 8" - 9"
Air Flow - 900 LPH (235 GPH)
Water Flow - 2000 LPH (530 GPH) 
*Footprint can be changed depending on the pumps orientation inside of the skimmer body


1x RSK 900 Reefer Protein Skimmer Body
1x RSK 900 Reefer Collection Cup with Neck Cleaner
1 Meter RSK 900 Reefer Drain Hose with Valve
1x RSK 900 Reefer Air Silencer with Pump Feed Hose
1x Sicce PSK Pump