Bulk Reef Supply

BRS Biopellet Reactor

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Designed to be easy to use, setup and maintain. Perfect for tumbling biopellets. No thumbs screws, foam pads or leaky lids common with other reactors. The reactor will hold up to 350mL (~1.5 cups) of biopellets. Suitable for tanks 75g and smaller.


The BRS Biopellet Reactor features several distinct advantages over other brands. 

  • Heavy duty all plastic construction.
  • High quality easy to use double O-Ring push connect fittings.
  • Easy to operate, clean and maintain.
  • High quality ball valve for precise tuning.
  • Filter wrench
  • (2) 3 Ft. sections of tubing
  • Instantly attaches to popular pumps using included push connect or threaded fittings.
  • 1/2" fittings and ports throughout reduce head pressure and provide ample flow rates.
  • Holds up to 350mL of biopellets (~1.5 cups).
  • Dimensions: 14.5"H x 5.5"W x 5"


Feed pump notes - You may use a variety of different feed pumps for this reactor but we recommend and offer the Sicce Syncra Silent 1.5 with our reactors.

Sicce Syncra Silent 1.5 – This pump is highly recommended. It is strong enough to tumble the biopellets continually and will likely have to be dialed back using the included valve. This will allow room for you to turn up the flow inside the reactor if it were to slow down due to tank debris collecting in the cartridge strainer. This pump option requires the least amount of maintenance and effort.


Warranty: 1 Year

More Information
Reactor Placement In Sump, Wall Mount
Media Capacity 1 Cup / 236mL
Warranty 1 Year
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Product Questions

Hi. Would this be suitable for a 32 gallon reef tank? And could I use a sicce 1.5 pump with it as I have a spare? Thank you.
Question by: Bruce Azueta on Apr 1, 2022, 7:48 AM
Hey there,
Thank you for reaching out to us. Yes, it will be perfect for a 32-gallon tank. You will need an NPT fitting to connect it.


Please let me know if you need anything further and take care!
Answer by: Matt Lucero (BRS Staff) on Apr 1, 2022, 7:57 AM
I have 90 gal total water volume. Would this be too small? Could I run to reactors?
Question by: michael kleine on May 29, 2017, 7:41 PM
Unfortunately this reactor would be a little too small for your system. You could run two reactors if you wished, but it would be best to have them run off a tee, or parallel, rather than in series, or you may have issues with flow loss between the stages.

Have a great day!
Answer by: Zack on Jun 7, 2017, 1:39 PM
Hi, I have a 125 with 2-3" sandbed and not that much live rock. Maybe 100 gallons of water? I don't have a few hundred dollars to spend on a biopellet reactor and was thinking of trying this. I'm thinking it would be better than nothing, or would you see this as a complete waste of money? thanks.
Question by: Steve on Jan 26, 2016, 2:30 PM
Great question!
Unfortunately the BRS bio pellet reactor would be small and cause some head aches on a system of your size. Instead of going for a bio pellet at this point you may want to consider carbon dosing such as NO3PO4x by Red Sea which is a liquid form of food for bacteria which can be dosed. Feel free to let us know if you have any further questions!

Answer by: Connor on Feb 3, 2016, 2:16 PM
i have a 120g tank, but this says its for 75g or smaller. could i use 2 of these inline or should i look for something else?
Question by: Devon on Jul 1, 2014, 8:33 AM
Hi Devon,
For a larger tank I would use a larger reactor :-) Something like one of the Octopus BH or Bio-Churn reactors seems like it would be a good choice.

Answer by: Bulk Reef Supply on Jul 1, 2014, 8:33 AM
whats the difference between BRS Biopellet Reactor and BRS GFO & Carbon Reactor - Single , thank you
Question by: mohammed on Nov 3, 2013, 5:24 AM
The internal cartridges are different as you don't want any foam pads in a biopellet cartridge. The biopellet reactor also comes with fittings for using larger pumps as typically something bigger then an mj1200 will be needed (like a mag drive 5 for example) and while the reactor chambers themselves are the same size, there isn't nearly the same capacity for running biopellets. Max dose is a little over a cup or so making the reactor good for tanks up to roughly 50g or so when using biopellets.
Answer by: Bulk Reef Supply on Nov 3, 2013, 5:24 AM
Would this be the best reactor choice for use as a CO2 scrubber? I have a Bubble Magus skimmer, and would like to connect it to the air intake.
Question by: James on Sep 18, 2013, 2:57 AM
Hey James,
For a setup like that you would actually want to look at the universal air filter. It has barb connections on it and is made for doing just that.
Answer by: Bulk Reef Supply on Sep 18, 2013, 2:57 AM