Reef Octopus

Super Reef Octopus CR5000D 8" Calcium Reactor

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Maintain the calcium and alkalinity in your reef tank with a high performance dual chamber calcium reactor from Reef Octopus. The Super Reef Octopus CR5000D 8" Dual Calcium Reactor has all the performance you've come to expect from the expert series of Super Reef Octopus.

  • Rated for aquariums up to 1000 gallons
  • Reverse flow and CO2 recirculating design
  • Water Blaster Blaster 5000 Recirculation Pump
  • 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 700 gallons

    Medium Stocked Tank - Rated up to 800 gallons

    Light Stocked Tank - Rated up to 1000 gallons


    • High performance 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: 2 Chambers - 8” Each
    • Foot Print: 18” x 15.5”
    • Total Height: 23”
    • Inlet Size: 1/4"
    • Max Feed Rate: 150 GPH
    • Suggested feed rate is slightly higher than a full flowing influent

      • Water Blaster 5000 Recirculating Pump Features:

        • Quiet operation
        • Silicone Nitride shafts and bearings to resist the build up of calcium
        • Power Consumption: 60 Watts

        Manufacturer's Warranty

        • 2 year on pump
        • 1 year on reactor body

        Item #: SRO-CR5000D

    More Information
    UPC 6950291210319
    Media Capacity 10+ Cups / 2365mL
    Reactor Placement External, In Sump
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    Product Questions

    Can the Water Blaster 5000 Recirculating Pump be replaced by a Varios controllable pump on the Reef Octopus Super Reef Octopus CR5000D 8" Calcium Reactor? I'd like the calcium reactor to be controlled by my Apex.
    Question by: Kyle on Jan 31, 2020, 3:08 PM
    Hey there,

    I am not aware if it would be compatible, please reach out to coralvue.com for a confirmation.

    Take care
    Answer by: Thomas Billington on Feb 6, 2020, 9:12 AM
    What is the best feed pump that you would recommend to add to this calcium reactor?
    Question by: Jay on Jan 19, 2017, 9:20 PM
    Awesome question! I would definitely recommend the Sicce Synchra Silent 0.5 in think link below. :-)

    Answer by: Randy on Jan 24, 2017, 11:10 AM