Reef Octopus

CR140 5.5" Calcium Reactor

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Maintain the calcium and alkalinity in your reef tank with CR140 Calcium Reactor from Reef Octopus.

  • Rated for aquariums up to 200 gallons
  • Reverse flow and CO2 recirculating design
  • Aquatrance 2000 Pump
  • Bubble counter
  • pH probe holder included (probe sold separately)

    A calcium reactor is used to maintain a balanced amount of calcium and alkalinity in your reef tank. In order to use a calcium reactor, you will need a CO2 regulator, CO2 tank, pH probe/controller, small feed pump (flow rate should be set 1-2 liters per hour) and calcium reactor media.


    Filtration Handling

    Well Stocked Tank - Rated up to 100 gallons

    Medium Stocked Tank - Rated up to 150 gallons

    Light Stocked Tank - Rated up to 200 gallons



    • Reverse flow design
    • Control the reactor with CO2 needle valve and the effluent valve
    • Auto fill bubble counter
    • pH probe holder
    • Easy to remove lid
    • Precision effluent control valve
    • Solid construction
    • 1/4" quick connect fittings


    Reactor Specifications:

    • Body Size: 5.5”
    • Foot Print: 12” x 11”
    • Total Height: 24”
    • Media Capacity: 3.8L
    • Inlet Size: 1/4"
    • Max Feed Rate: 150 GPH
    • Suggested feed rate is slightly higher than a full flowing influent


    Aquatrance 2000 Pump Features:

    • Quiet operation
    • Power Consumption: 45 Watts


    Manufacturer's Warranty

    • 2 year on pump
    • 1 year on reactor body


    Reef Octopus Calcium Reactor Manual

    More Information
    SKU 204100
    UPC 6950291210494
    Media Capacity 4 Cups / 946mL, 5 Cups / 1183mL, 6 Cups / 1419mL
    Reactor Placement External, In Sump
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