Reef Octopus

BioChurn 120R Recirculating Biopellet Reactor

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Discontinued by Bulk Reef Supply
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The BioChurn 120INT Biopellet Reactor by Reef Octopus has a unique cascading design to allow for greater surface area to help bacteria colonize plus a patent pending churn plate to gently fluidize media.

  • Rated for aquariums up to 200 gallons
  • Cyclone churning motion for media suspension
  • Equipped with Aquatrance AQ-1000 feed pump
  • Recirculating



  • Solid construction
  • Refined control - independent flow valves to independently control the flow of media within reactor
  • Patent pending churning plate - suspends media for more contact with nutrient rich aquarium water
  • Easy to maintain upper containment plate


Reactor Specifications:

  • Capacity: approx. 900 mL
  • Diameter: 5”
  • Height: 20”
  • Footprint: 11.82” x 7.1"
  • Output Size: 1"
  • Inlet Feed Size: 1/2" or 3/4"
  • Suggested Feed pump producing 270-530 GPH


Aquatrance 1200 Pump Features:

  • Power Consumption: 15 Watts
  • Max Water Flow: 340 GPH


Manufacturer's Warranty

  • 1 year on reactor body
  • 2 year on Aquatrance pump
  • 1 year on rotor


Item #: OCT-BC120R

More Information
UPC 6950291220110
Reactor Placement In Sump
Media Capacity 4 Cups / 946mL
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Product Questions

Also, someone else answered a question saying it's designed to be run externally - can it also be placed in the sump next to the skimmer?
Question by: James Allen on Nov 14, 2016, 7:53 AM
Hey James,
This reactor can be ran both internally as well as externally : )
Answer by: Jason Smith on Nov 15, 2016, 7:48 AM
What would the benefit to this reactor be compared to the Biochurn 120INT, which has a pump and it looks to be much easier to refill the media?
Question by: James Allen on Nov 14, 2016, 7:40 AM
Great question! This model can be used externally, unlike the 120INT model. This would require a separate feed pump, however that also allows for the included pump to be solely dedicated to churning the biopellets. :-)
Answer by: Randy on Nov 15, 2016, 6:39 PM
Can this reactor run externally?
Question by: Melvin on Feb 11, 2014, 11:35 AM
Hi Melvin,
That's not a problem at all, its designed to be run outside the sump.
Answer by: Bulk Reef Supply on Feb 11, 2014, 11:35 AM
Does this reactor need any additional pumps and if so what pump?
Question by: Kris on Dec 25, 2013, 8:31 AM
Hi Kris,
This reactor would require a feed pump to supply aquarium water to the reactor. They recommend a pump between 270 and 530gph. The sicce syncra silent 2.0 would be a good choice as its up to 568gph and has an adjustable inlet on the pump to adjust the flow.
Answer by: Bulk Reef Supply on Dec 25, 2013, 8:31 AM