FR-SE Media Reactor for GFO, Biopellets & Carbon (Hang on Back)

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AquaMaxx FR-SE External Media Reactor is a great multi-purpose aquarium water filters specially designed for use in smaller marine and reef aquaria. Insert your media of choice to help eliminate organic pollutants, odors, discolorations and algae fuels. Great for use with Carbon, GFO and Biopellets!

The up-flow design of AquaMaxx FR-SE External Media Reactor helps to keep filter media suspended and evenly dispersed to provide maximum contact time between your aquarium water and the media inside the reactor. Water is introduced into the bottom of the filter and then pushed upward through the media and back out into your tank. An innovative bracket keeps the inlet and outlet tubes securely in place.
*Water pump and tubing sold separately

Made of high-quality acrylic components for precise fitment and excellent durability. Built-in hang-on bracket allows for easy installation.


  • Chamber Diameter: 3.2"
  • Height: 14.6"
  • Minimum Tank Height: 12.5"
  • Accommodates aquarium rims up to 3/4"
  • Maximum Capacity: 1.0L (1000mL) ~4.2 Cups
  • Using GFO: up to 150 gallons
  • Using Activated Carbon: up to 75 gallons
  • Using BioPellets: up to 50 gallons
  • Inlet/Outlet: 1/2" hose barb
  • Recommended Flow Rate: up to 150GPH for carbon or GFO, up to 300GPH for BioPellets*
    *flow rate must be adjusted based on the amount of media used. An adjustable pump or a ball valve are recommended.
More Information
UPC 638346945107
Manuals Instruction Manual
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Product Questions

What size pump should I use with this reactor?
Question by: Joshua Stevens on Aug 20, 2022, 11:21 PM
Hey there,
Thank you for reaching out to us. That will depend a bit on the media you put in it.
Recommended Flow Rate: up to 150GPH for carbon or GFO, up to 300GPH for BioPellets
Please let me know if you need anything further and take care!
Answer by: Matt Lucero (BRS Staff) on Aug 22, 2022, 10:03 AM
How do I get a o ring rebuild kit
Question by: jason ruff on Dec 27, 2021, 3:37 PM
You would need to give us a call to get this ordered.

Phone Hours:
8am - 6pm CT M-Th
9am - 4pm CT Friday
Main: 763-432-9691
Answer by: Matt Lucero (BRS Staff) on Jan 14, 2022, 9:27 AM
Does this come with the tubes to run from the reactor into your tank?
Question by: Nicholas on Dec 9, 2021, 2:16 PM
Thank you for your question. Tubing is not included with the reactor. The reactor has 1/2" barb fittings. You can find tubing that you can use on the reactor here:
Answer by: William Glenn (BRS Staff) on Dec 15, 2021, 1:34 PM