Reef Octopus

Regal 300EXT 12" Recirculating Protein Skimmer (VarioS)

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Reef Octopus Recirculating 12" Protein Skimmer from Reef Octopus - with a controllable VarioS DC pumps to process more or less water, depending on your aquariums needs.


Reef Octopus Regal Skimmers now incorporate the new VarioS S pinwheel series of pumps. The new pumps are DC powered allowing for several advantages over traditional AC style pumps. The VarioS pumps can be fully controlled by a 3rd-party controller or through the included control unit. With 5 different preset speeds, and multiple feed modes, you can fine-tune Regal skimmers for superior performance on your particular system.


Recirculating skimmers can be employed either externally or internally (in-sump) and are usually a bit more efficient than the traditional in-sump skimmer. They do require a bit more space and height generally but the ability to fine tune, the feed pump, recirculating pump, and discharge lets you create the perfect skimmer for your tank needs. When skimmers are mounted externally, we frequently suggest a Waste Collecter, however, Reef Octopus has thought one step farther than the competition integrating a float switch into the collection cup, protecting from potential messy overflows.


Note: A feed pump is required that can flow around 1.5 - 2 times the systems volume. We suggest a pump around 600-1000 GPH, and particularly like the VarioS 6 Controllable DC pump or Sicce Syncra Pro 1900, we also highly recommend a gate valve to help control and fine tune the flow of water into the skimmer from the feed pump.



  • VarioS-6 DC controllable pump
  • Apex Ready
  • Safety overflow float switch for cup
  • High quality cast acrylic
  • Hybrid Cone Shape
  • High volume air intake
  • Skimmer Drain for easy cleaning
  • Quiet operation
  • Solid construction
  • Easily removed collection cup
  • Detachable controller with waterproof union
  • 3rd-Party controller input (0-10V)
  • 2 year warranty on pump body
  • 1 year warranty on pump rotor (pinwheel impeller)
  • 1 year warranty on skimmer body


VarioS-6 S Pinwheel Pump Features:

  • Air Draw: 1200-2400 LPH / 42-84 SCFH*
  • Power Consumption: 35-70W
  • Voltage: DC 36V

Feed Pump Suggested Flow Rate - 1200 - 1600 GPH

*Aquarium set up will determine air and water results.


BRS Recommended for tanks up to:

  • Heavy Bioload (Most Common) - 400 Gallons
  • Medium Bioload - 550 Gallons
  • Light Bioload - 700 gallons


Skimmer Specifications:

  • Body Diameter: 12"
  • Neck Size: 6.7"
  • Height - 28.4″
  • Foot Print: 20" x 17.5"
  • Total Height: 28.4"
  • Output Size: 50mm - 1.5”
  • Output Height: 9.56"
  • Requires Feed Pump*


What's Included?

  • Regal 300 EXT Protein Skimmer
  • VarioS-6 S Pinwheel Pump
  • VarioS Control Unit
  • Skimmer Cup Float Switch
  • Output Gate Valve
  • Metric to Standard Adapter


Available Accessories

  • Neck Cleaner: CL-300
  • Neck Extension: NK-300
More Information
SKU 210204
UPC 6950291251800

pdf Regal Skimmer Setup Guide

pdf VarioS Controller Quick Start Guide

Skimmer Type External, Recirculating
Capacity Light Bioload - Up to 700 Gallons
Medium Bioload - Up to 550 Gallons
Heavy Bioload - Up to 400 Gallons
Dimensions 20"L x 17.5"W x 28.4"H
Diameter 12" Body, 6.7" Neck
Output Size 1.5" (1-1/2 in.)
Air Draw 1200-2400 LPH
Flow Rate 528 GPH
Pump Model VarioS 6-S
Pump Rotor Type Pinwheel
Variable Speed Yes
Power Type DC
Power Consumption 35 - 70 Watts
Warranty 2 Years (pump body), 1 Year (pump rotor), 1 Year (skimmer body)
Additional Notes Feed Pump Required -- Suggested Flow Rate: 1200 - 1600 GPH
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Product Questions

Where should water level be on this skimmer?
Question by: Gabe on Apr 12, 2017, 9:27 AM
Hey there,
The Regal 300EXT is actually set up to be a re-circulating skimmer with a dedicated feed pump. Because of this, the external water level is not critical and this skimmer can be run inside or outside of the sump at various sump water levels, so long as the output pipe is clear and open.

Hope this helps!
Answer by: Zack on Apr 21, 2017, 2:58 PM