Sigma-1 In-Sump Media Reactor

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AquaMaxx Sigma-1 In-Sump Media Reactor

The new Sigma-1 and Sigma-2 media reactors with detachable docking base are now available! These convenient and detachable media canisters make it easy to clean and change out your media. Just twist to lock or unlock the canister from the docking base, keeping the pump and cord stationary in your system at all times.

These multi-purpose in-sump media reactors can be used with carbon and GFO to help eliminate organic pollutants, odors, discolorations and algae fueling elements within marine and reef aquaria. The up-flow design with fluidized plates helps to keep filter media suspended and evenly dispersed in order to provide maximum contact time with your aquarium water. Water is introduced into the bottom of the filter and is then pushed upward through the media and back out into your tank. The integrated adjustable Sicce pump allows you to easily change the flow rate to best suit your needs, all while keeping a minimal footprint for your in-sump setup.


  • Can be used with Carbon or GFO
  • Up-flow design for maximum contact time between media and aquarium water
  • Detachable canister for easy media changes
  • Integrated Sicce pump with adjustable flow rate
  • Compact footprint
  • Highly efficient, durable, and reliable
  • Simple to operate
  • Easy to set up and disassemble for cleaning
  • Cell-cast acrylic construction

Notes for Use:
Rinse media thoroughly until it runs clear before connecting to the base and plugging in the pump. There are two adjustment points: on the pump and when twisting the canister. Always set the pump to its lowest flow setting and allow the water to fill the entire canister completely and very slowly to prevent media from quickly floating to the top and exiting out of the reactor. Once the chamber is filled, unplug the pump, tap on the reactor to release any trapped bubbles and allow the media to settle. Once you`re ready, plug it back in and adjust the strength of the water flow by twisting the canister slowly, allowing more water to enter for a gentle tumble with your media.

Sigma Reactor Comparison Chart


Sigma-1 (This item)


Footprint 3.94" x 4.33" 5.12" x 5.51"
Height 13.39" 14.57"
Rating Using Activated Carbon 1 Cup Max 2 Cups Max
Using GFO 3/4 Cup Max 1.5 Cups Max
Pump Sicce Syncra Nano Sicce Syncra 0.5
Power Consumption 2.8 W 8 W
More Information
UPC 651137770863
Reactor Placement In Sump
Media Capacity 1 Cup / 236mL
Pump Included Yes
Power Consumption 2.8 Watts
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Product Questions

Will using this style of reactor cause the water to just recirculate? If the pump pulls from the bottom and the water just flows down the side won't it end up pulling back in water that it just cycled?
Question by: Ian Hough on Jan 18, 2023, 3:36 PM
Hey ian, thanks for the question! Theoretically you will have a water level that extends beyond the pump. So the pump will pull the bottom layer of your sump and dump into the top layer!
Answer by: James Johnson (BRS Staff) on Feb 9, 2023, 11:19 AM
Will this work using carbon /GFO in the back chamber of a JBJ RF65 AIO tank. If not can you recommend a reactor that would thanks
Question by: Craig Houser on Nov 6, 2022, 10:56 AM
Thanks for reaching out to us! This reactor will fit in the RF65 without any issue. You may need to put it on a DIY stand depending on the chamber you put it in, but it will fit without issue. Please let us know if we can help with anything else!
Answer by: Kyle Thomas (BRS Staff) on Nov 9, 2022, 10:37 PM
Will this fit any of the available chambers of an IM Nuvo Fusion 20?
Question by: Stacey K. on Aug 29, 2022, 12:31 PM
Hey there,
Thank you for reaching out to us. No, it is too wide.

Please let me know if you need anything further and take care!
Answer by: Matt Lucero (BRS Staff) on Aug 30, 2022, 9:37 AM
Would these reactors be suitable for bio pellets?
Question by: Bobby on Nov 27, 2021, 10:11 PM
Hello, thank you for the question. The pump on these reactors is not strong enough to tumble bio-pellets, but these work great for GFO or Carbon. Happy Reefing.
Answer by: Christian (BRS Staff) on Nov 28, 2021, 12:02 PM
Using GFO, how large of an aquarium can this product be recommended for?
Question by: Randy Phillips on Nov 14, 2021, 5:54 PM
That will depend on the GFO you use, but if using the High capacity BRS GFO, it can handle a tank up to 96 gallons.
Answer by: Matt Lucero (BRS Staff) on Nov 15, 2021, 8:04 AM