Reef Octopus Regal 300EXT Recirculating Protein Skimmer


  • Latest in DC Controllable Technology
  • The Best in Recirculating Design
  • 5 Controllable Energy Efficient Power Settings
  • Detachable Controller with Waterproof Union
  • 12in Solid Constructed Hybrid (1/2 cone) Skimmer Body
  • High Volume Air Intake
  • Quiet Operation
  • Body Drain

Regal Skimmers Logo 300-EXT / Advanced Control Recirculating Protein Skimmer

The new and innovative Reef Octopus Regal 300-EXT recirculating protein skimmer supplies powerful filtration for aquariums up to 700 gallons where absolute control is a necessary. The Reef Octopus Regal 300-EXT is constructed of high-quality cast acrylic that disassembles completely for cleaning. Its hybrid conical body naturally stabilizes and concentrates the organic rich foam as it rises.

RODC Skimmer PumpThis Regal skimmer is quipped with a new generation Reef Octopus controllable Direct Current DC-5500S pinwheel recirculating skimmer pump which are the latest in variable speed flow technology and allows for refined control, enhanced performance and efficiency. The vast majority of skimmer pumps available to hobbyist are alternating current "AC" pumps (the type of power that comes out of your wall outlet). Direct current pumps have several key advantages over traditional AC pumps. Most notably, you can control the rotational speed of the motor, thus electronically control air and water flow rates into the skimmer. Now the user can have the skimmer process more or less water just by the push of a button!!!


RODC logoEnhanced Control

This controller allows users to select between five preset speeds indicated by five lit LEDs. The controller also features a feed/service and an On/Off button. When the feed button is pressed, the skimmer pump shuts down and will automatically reactivate after 10 minutes. Press the feed button a second time to resume normal operation. RO DC pumps feature a true slow startup where the pump slowly ramps up from zero RPM to the full preset speed over a period of approximately 10 seconds.

The pump and controller are connected via a waterproof 3-conductor union. The detachable controller will allow for a simple waterproof union. The volute can rotate to change the pump's output orientation in 90 degree intervals, meaning users can output water vertically (up or down) as well as horizontally.

*There is an addition part needed to convert the pump to the skimmer body for some models that must be requested at the time of purchase due to the added cost of the part.

Filtration Handling

700 Gallon – Light Filtration Demand 

600 Gallon – Medium Filtration Demand 

500 Gallon – Heavy Filtration Demand

Controllable External Recirculating Skimmer Rated for Aquariums up to 700 Gallons

Footprint: 20″ x 17.5″ | Reaction Chamber: 12″ | Height: 28.4″ Powered by: RO-DC 5500s Pinwheel Pump

Max Flow: gph / Max Air: 2000 L/H (70 SCFH)*

Power Consumption: 35-50watts

Hybrid Cone Body: 12in Footprint: 15.2in x 13in Neck Size: 7in Total Height: 25.6in Output Size: 50mm /1.5in

Note: Requires Feed pump Recommended feed rate of 1.5-2x system volume. Suggested 1200-1600gph

Pump Information

Reef Octopus Controllable DC 5500s Pinwheel Pump Power Consumption: 35-50watts Voltage: DC 24V Air Draw: 1200-2000 lph / 42-70 SCFH* Water Draw: gph

*Air and water results will vary depending on aquarium setup


Neck Cleaner: CL-300 Neck Extension: NK-300

2 year coverage on pump/1 year on rotor -1 Year on skimmer body

Reef Octopus can not be responsible for consequential damages arising from installation or use of this product. Reef Octopus warrants the pump to be free from defects in material and workmanship under normal use and conditions for the warranty period from the date of purchase. CoralVue liability under this warranty shall be limited to repairing or replacing at CoralVue’s discretion, without charge. CoralVue will not be liable for any cost of removal, installation, transportation, or any other charges which may arise in a warranty claim.

NOTE: This warranty is void if the product is damaged through abnormal operating conditions, accident, abuse, misuse, unauthorized alteration or repair. This warranty is valid only in North America and is non-transferable. Consumable spare parts are not applicable to the warranty.