10X Points Today On Top Brands PLUS Mystery Rewards - Learn More

Preferred Reefer Event Today - Learn More

Reef Octopus

CR100 4" Calcium Reactor (OPEN BOX) - Reef Octopus

In stock

Earn 254 Reward Points

- +

    Maintain the calcium and alkalinity in your reef tank with CR100 Calcium Reactor from Reef Octopus.

    • Rated for aquariums up to 150 gallons
    • Reverse flow and CO2 recirculating design
    • Aquatrance 1200 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 90 gallons

    Medium Stocked Tank - Rated up to 125 gallons

    Light Stocked Tank - Rated up to 150 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: 4”
    • Foot Print: 9.5” x 7.5”
    • Total Height: 20”
    • Media Capacity: 1.7L
    • Inlet Size: 1/4"
    • Max Feed Rate: 150 GPH
    • Suggested feed rate is slightly higher than a full flowing influent


    Aquatrance 1200 Pump Features:

    • Quiet operation
    • Power Consumption: 15 Watts


    Manufacturer's Warranty

    • 1 year on pump
    • 1 year on reactor body
    More Information
    Product Name CR100 4" Calcium Reactor (OPEN BOX) - Reef Octopus
    SKU 207882OB
    Media Capacity 2 Cups / 473mL, 3 Cups / 710mL, 4 Cups / 946mL
    Reactor Placement External, In Sump
    Write Your Own Review
    You're reviewing:CR100 4" Calcium Reactor (OPEN BOX) - Reef Octopus
    Your Rating
    Only registered users can write reviews. Please or