BRS Biopellet Reactor

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BRS Biopellet Reactor

95% Recommend this to a friend (21 of 22)

SKU: 221010

reg. $49.99

Special Price: $42.49

In Stock: 55
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Quick Overview

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.

Full Details

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 there are two popular options we recommend.

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.

Cobalt Aquatics MJ 1200 – This is an affordable option and works with small tanks and very short distances

    • It is important to install the reactor close to the water level of your tank/sump to minimize head pressure.


    • It is also important to keep the cartridge strainer free of floating tank debris. You can do this by using the foam Maxijet prefilter, filter socks on your sump return and placing the pump in a clean area of your sump


  • If it does clog you can clean the cartridge strainer as part of your standard maintenance schedule or upgrade the pump at a later date.


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  • works great By south texas on 6/27/2017

    I bought his reactor a couple months ago. At first it worked great then after about a month it would stop tumbling the media. I would clean the screens and it would work good again for awhile. Finally I took it apart and found a small piece of plastic egg crate lodged in the 90 deg inlet (my fault). Now it works as it should but still occasionally requires cleaning the screens.
  • perfect By mike on 3/6/2015

    Easy to set up and works
  • OK But requires weekly Maintenance By Ellery on 3/15/2014

    As in another review it works well if a proper pump is added for flow and weekly cleaning is down on the chamber screens on top and bottom getting clogged with the film. If they created a screen unique for biopellets that are bigger than that for the GFO/Carbon then it would help reduce the maintenance required.
  • Heavy duty and well made By Stephen on 1/13/2014

    Well made and heavy plastic, hold hold up for many years, jut wish they had include a little more tubing, need to buy more locally to plumb it to work for my situation..
  • Excelente biopellet By Vargas on 9/15/2013

    I have a 125g mix reef aquarium and after trying nextreef and two little fishes and didn't work this biopellet reactor is the perfect one,you got the tumble as you wanted it, very easy to set up. Thanks BRS.
  • Not for biopellets By trigger on 5/17/2013

    I have 1 of these reactors and 2 of the black brs ones. They are perfect for GFO and Carbon, however i dont think they are ideal for Biopellets what so ever. After just 1 week the biopellets are barely tumbling because of gunk buildup inside the filter that restricts flow. This has to be cleaned weekly to keep the biopellets tumbling. Having to do this makes it a chore so I am seriously considering a different reactor. I hope BRS will re-design this reactor so that it doesnt clog as easily. Do not recomment for BIO Pellets. Only for GFO and Carbon.
  • For all your media needs! By Thomas on 11/17/2012

    I use this reactor for everything from bio pellets to gfo. Amazing quality
  • Quality Reactor By Mike on 10/21/2012

    The reactor is made of thick plastic and is built very well. The quick connect and swivels help get it up and running fast. Love this reactor.
  • GREAT REACTOR FOR THE MONEY By Pete on 10/3/2012

    Works like a charm, using a maxi jet 1200 for a good flow.
    Old two little fishes reactor too many problems.
    Very happy and I'd recommend to all you reefers out there this is the reactor for you.
  • best buy for your money By r. wilmeth on 9/22/2012

    like every BRS product i have ever bought this reactor is very high quality. like alot of people my first reactor was a converted phosban reactor powered by a maxi jet. no mater what i did i could not get a good even flow and with biopellets that is key. when i recieved my BRS reactor i was imediately impresed. i had it mounted in minutes and out of curiousity i hooked the maxijet up to it.because of the design of the reactor it had all the pellets moving. my reactor is mounted at sump level so the maxijet only has 6 inches of head presure any more i would have gone with a bigger pump.i have a much more expencive unit on another tank and like it alot but it cost more than three times as much as the BRS reactor.
  • My Nitrates read zero! By Andrew on 6/7/2012

    I have an overstocked reef tank... enough said my nitrates were always a bit high even when I did a lot of water changes. I had to do one every week to keep it at bay. My corals never really had amazing colors and great growth. I bought this product and the BRS Bio Pellets and since than my phosphates read zero! I love this thing! Only thing is that my SKIM SMELLS FOUL but i can deal with that!
  • works great By david on 4/28/2012

    works great, good controll of tumble, easy assembly


Ask a question

Product Questions

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 2:30:00 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 (Admin) on Feb 3, 2016 2:16:00 PM
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 7:41:00 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 (Admin) on Jun 7, 2017 1:39:00 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 8:33:00 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 8:33:00 AM
whats the difference between BRS Biopellet Reactor and BRS GFO & Carbon Reactor - Single , thank you
Question by: mohammed on Nov 3, 2013 5:24:00 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 5:24:00 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 2:57:00 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 2:57:00 AM