NextReef MR1 XL GFO and Carbon Filter Media Reactor


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NextReef MR1 XL Media Reactor

NextReef Reactors Loom Large Over the Competition! The MR1 families 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 23 inches tall… that`s over one gallon, big enough for large reef systems – up to 375 gallons.

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


  • Recommended Tank Size: 375 gallons Marine / 750 gallons Freshwater
  • Height: 23″ Overall Height / 21″ Reaction Chamber (585mm / 535mm)
  • Width: 6″ Overall (150mm) Reaction Chamber: 21″ x 4″ (535mm x 100mm)
  • Total Capacity: 230 cubic inches / 1.0 gallons / 127 fluid ounces / 3.8 litre
  • Inlet / Outlet: 1/2″ 90 Degree Barb Fittings – fits standard 1/2″ ID tubing
Weight 3 lbs