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NextReef MR1 Monster GFO and Carbon Filter Media Reactor

 NextReef MR1 Monster 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 two gallons, big enough for large reef systems - up to 600 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: 600 gallons Marine / 1200 gallons Freshwater
Height: 23" Overall Height / 21" Reaction Chambers (585mm / 535mm)
Footprint: 12.5" x 6" (325mm x 150mm)
Reaction Chamber: 21" x 4" (Dual) (535mm x 100mm)
Total Capacity: 465 cubic inches / 2.0 gallons / 255 fluid ounces / 7.6 litre
Inlet / Outlet: 1/2" 90 Degree Barb Fittings - fits standard 1/2" ID tubing

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  • Model: NR1581
  • Manufactured by: NextReef

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