Regal 300EXT 12" Recirculating Protein Skimmer (VarioS) - Reef Octopus

Regal 300EXT 12" Recirculating Protein Skimmer (VarioS)
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  • Regal 300EXT 12" Recirculating Protein Skimmer (VarioS)
  • Regal 300EXT 12" Recirculating Protein Skimmer (VarioS)
  • Regal 300EXT 12" Recirculating Protein Skimmer (VarioS)
  • Regal 300EXT 12" Recirculating Protein Skimmer (VarioS)
  • Regal 300EXT 12" Recirculating Protein Skimmer (VarioS)

Regal 300EXT 12" Recirculating Protein Skimmer (VarioS) - Reef Octopus

100% Recommend this to a friend (3 of 3)

SKU: 210204

reg. $1,099.99

Special Price: $989.99

In Stock: 9
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Quick Overview

BRS Recommended for tanks up to:

Heavy Bioload (Most Common) - 400 Gallons

Medium Bioload - 550 Gallons

Light Bioload - 700 gallons

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.

  • Footprint - 20" x 17.5"

  • Height - 28.4″

  • Requires Feed Pump*

Feed Pump Suggested Flow Rate - 1200 - 1600 GPH


Full Details

Regal Skimmer Setup Guide


VarioS Controller Quick Start Guide


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.


Filtration Handling

Well Stocked Tank - Rated up to 400 gallons

Medium Stocked Tank - Rated up to 550 gallons

Light Stocked Tank - Rated up to 700 gallons



  • 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


Skimmer Specifications:

  • Body Diameter: 12"
  • Neck Size: 7"
  • Foot Print: 20" x 17.5"
  • Total Height: 28.4"
  • Output Size: 50mm - 1.5”
  • Output Height: 9.56"


VarioS-6 S Pinwheel Pump Features:

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

*Aquarium set up will determine air and water results.


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


3 Items

  • B E A S T of a skimmer!! By jon on 7/19/2017

    my old SWC just wasnt cutting it for the amount of water volume i have. so i started researching and looked at every large recirculating skimmer out there. the 300EXT had all the options i was looking for and would handle the amount of water volume i had (and then some!) it arrived today and i had it assembled and running in about a half hour. the build quality is top notch. if you are looking for a good external skimmer for a larger system, look no further.
  • Really Nice Skimmer By CrazyDiamond on 4/23/2017

    I bought it before the New controller was made available. The old controller is also variable and the pump is DC. The skimmer has 5 settings on the controller I have and I basically keep it at level 5 (full blast) 24/7. I have the sicce pump in the sump about 4-5 feet away and it is feeding the water nicely. Skimmer has been running for a year and change & it pulls a significant amount of waste out of my 500 gallon set up. I have a 5 gallon bucket waste collector set up which I clean along with the collection cup every 2 weeks or so. I have had a few different skimmers over the years and really appreciate the effectiveness and ability to fine tune this external model. I am happy with this product and would recommend it to anyone looking for a pretty big solid skimmer under a grand.
  • Regal 300 ext By Burrellch on 3/18/2017

    Wow. I was more than nervous because I couldnt find any reviews for this item and for my budget this was not a cheap purchase. So... this skimmer rocks... so easy to clean. Love the built in float valve and the pump is top notch. Definitely happy with my decision.


Ask a question

Product Questions

Where should water level be on this skimmer?
Question by: Gabe on Apr 12, 2017 9:27:00 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 (Admin) on Apr 21, 2017 2:58:00 PM