Octo Regal 300EXT Recirculating Protein Skimmer

Reef Octopus Regal 300-EXT Recirculating Protein Skimmer

The Reef Octopus Regal 300-EXT is the flagship external recirculating protein skimmer, designed for the most demanding residential reef systems and commercial displays up to 740 gallons. Boasting a massive 12-inch wine-glass body, this skimmer utilizes a recirculating design where the VarioS-6S DC pump focuses entirely on air-water mixing within the reaction chamber. By using a separate feed pump (sold separately) to control the flow-through rate, the user can achieve absolute precision in dwell time—ensuring that organics are fully processed before water returns to the system.

Built with industrial-grade cast acrylic, the Regal 300-EXT is designed for high-capacity performance and longevity. The controllable DC technology allows for digital fine-tuning of the air intake, while the integrated safety float switch provides essential protection for external installations by preventing cup overflows. With a heavy-duty geared gate valve for water level adjustment and a design that optimizes foam concentration, the Regal 300-EXT provides commercial-level nutrient export for large-scale marine environments.

Key Features

• Independent Feed Control: Dictate the dwell time by selecting a feed rate that matches your specific bioload and filtration goals.

• VarioS-6S Controllable Pump: High-efficiency DC motor with a ceramic shaft and 5 speed presets for silent, reliable operation.

• External Safety Guard: Controller-linked float switch prevents messy overflows—a must-have for out-of-sump filtration.

• 12-Inch Wine-Glass Design: Maximizes reaction volume while naturally stabilizing the foam column as it enters the neck.

• Precision Geared Valve: Provides significantly more control than standard wedge pipes for "dialing in" the perfect water level.

Bioload Handling

• Heavy Bioload: 400 Gallons

• Medium Bioload: 600 Gallons

• Light Bioload: 740 Gallons