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The MR1 family of Media/Substrate Reactors feature a massive 4-inch reaction chamber. The extra wide design maximizes water to media contact, increasing efficiency and minimizing dead zones in the reactor.

NextReef Reactors have the largest capacities around, giving you the ability to run large amounts of media, or multiple products simultaneously. They’re ozone-safe, and perfect for phosphate control, de-nitrification or fluidized sand filtration.

The NextReef MR1 stands over 14 inches tall... that’s over a half gallon, big enough for large reef systems - up to 250 gallons.

Need more room? Try the MR1 Monster - the dual 21" chambers hold 2 gallons. The MR1 Monster is the only giant reactor to feature dual towers - big capacity that fits under a standard aquarium cabinet! The dual chambers can be setup independently for maximum flexibility, or in series from a single input.

Every NextReef Reactor is hand-crafted in the USA from the highest quality materials, and CAD engineered/CNC cut for a precise fit.

MR1

• Recomended tank size: 250 gallons marine/500 gallons freshwater
• Height: Overall height 16"
• WIdth: 6" overall
• Reaction chamber: 14" x 4"
  
• Total capacity: 155 cubic in/.68 gallons/86 fluid ounces/2.6 litre
• Inlet/Outlet: 1/2" 90 degree barb fittings - fits standard 1/2" ID tubing

• Recomended tank size: 375 gallons marine/750 gallons freshwater
• Height: Overall height 23"
• WIdth: 6" overall
• Reaction chamber: 21" x 4"
  
• Total capacity: 230 cubic in/1 gallons/127 fluid ounces/3.8 litre
• Inlet/Outlet: 1/2" 90 degree barb fittings - fits standard 1/2" ID tubing

• Recomended tank size: 100 gallons marine/200 gallons freshwater
• Height: Overall height 8.5"
• WIdth: 6" overall
• Reaction chamber: 7" x 4"
  
• Total capacity: 77 cubic in/.34 gallons/43 fluid ounces/1.6 litre
• Inlet/Outlet: 1/2" 90 degree barb fittings - fits standard 1/2" ID tubing

• Recomended tank size: 600 gallons marine/1200 gallons freshwater
• Height: Overall height 23"
• WIdth: 12.5" x 6"
  
• Reaction chamber: 21" x 4" (dual)
  
• Total capacity: 465 cubic in/2 gallons/255 fluid ounces/7.6 litre
• Inlet/Outlet: 1/2" 90 degree barb fittings - fits standard 1/2" ID tubing