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AquaMaxx Sigma-2 In-Sump Media Reactor

$139.99 $118.99Save: $21.00 (15%)

Item #: UJ77087

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AquaMaxx Sigma-2 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-2 (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

Manufacturer information

AquaMaxx is a Southern California-based aquarium supply company that entered the market in mid-2008 with a line of affordable metal halide bulbs. The brand quickly gained recognition as word spread about the high quality and low cost of their lamps. In 2009, AquaMaxx released a line of aquarium filter socks and, in early 2010, unveiled an assortment of high-performance protein skimmer accessories and upgrades.

3 Stars


Reviewed on
November 25, 2020

No, I would not recommend this.


Pros: removable media cartridge

Cons: difficult to adjust, dial on the top serves no actual purpose

I have tried many reactors over the years and was pretty excited when I saw this one because of the advertised ability of changing the media without removing the reactor. It is true that you can do that and I'm happy about that and the easily replaceable Sicce pump, that's about all I like. The top...does what? The lid just sits on the reactor, there is no purpose to the open/close dial because if you turn it all the way closed you can still lift the top right off. Adjusting the flow through the reactor is also a challenge because it you twist the media chamber...and that moves the bottom with it. At the end of the day, this is not even close to worth what I paid for it.

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