Pax Bellum ARID N18 Macro Algae Reactor

The Pax Bellum ARID N18 is a compact yet highly efficient macroalgae reactor designed to optimize nutrient export in small reef and nano aquariums. Using Chaetomorpha macroalgae, the N18 removes excess nitrates and phosphates while stabilizing pH and improving dissolved oxygen levels. Its coaxial LED light array delivers intense PAR for rapid algae growth, and vapor heat-pipe technology ensures LEDs stay cool, maximizing lifespan without adding heat to your tank.

Perfect for aquarists looking to reduce clutter, the ARID N18 can replace GFO, nitrate reactors, bio-pellet reactors, carbon dosing, and protein skimmers, offering a stand-alone solution for maintaining pristine water quality. Its premium acrylic construction and magnetic removable light cover allow easy inspection and maintenance of the macroalgae mass.

Key Features

• Compact Nano Reactor for aquariums 40–120 US gallons (150–450 L)

• Coaxial LED light array ensures even light distribution for algae growth

• Vapor heat-pipe technology keeps LEDs cool and efficient

• Rapid Chaetomorpha growth for maximum nutrient uptake

• Replaces GFO, nitrate reactors, bio-pellet reactors, carbon dosing, and skimmers

• Premium cast acrylic construction with polished edges

• Optional calcium injection assembly compatible

• Ships with starter solutions: 125ml Nitrate + Molybdenum, 30ml Iron + Manganese

Specifications

• Size: 16.5 × 16.5 × 45.72 cm

• Optimal Flow Rate: 600–800 L/hr

• Recommended Tank Bioload:

  • Light: 160 L

  • Medium: 400 L

  • Heavy: 600 L

• LED Power Consumption: 12 W

• Placement: Can be installed in sump (keep tyvek wrap above water)

Recommended Dosage

Nitrate & Molybdenum:

• 1 ml per 100 L raises NO₃ by 0.5 ppm

• Dose as needed to maintain NO₃:PO₄ ratio ~100:1

Iron & Manganese:

• 1 drop per 25 gallons daily

Important: Do not use concurrently with carbon dosing, nitrate reactors, bio-pellet reactors, or GFO. Use Pax Bellum solutions for optimal performance.