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Reef Octopus CR100 4 inch Calcium Reactor

Sku: CV-CR100

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Reef Octopus CR100 4 inch Calcium Reactor

Sku: CV-CR100


Availability: Factory Direct - Usually Ships Out Within 1-2 Days

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Footprint: 9.5" x 7.5" | Body Diameter: 4" | Height: 20"
Recirculation Pump: Aquatrance 1200

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HEAVY 75 gallons

MEDIUM 100 gallons

LIGHT 120 gallons

  • Reverse flow and CO2 Recirculating Design
  • Auto Fill Bubble Counter
  • Probe Holder w/Plug*
  • Easy to Remove Lid
  • Precision Effluent Control Valve
  • Solid Construction
  • 1/4"quick connect fittings
  • 1yr Pump Warranty

* Does not include PH probe.

Quality, design and affordability define the Octopus Calcium Reactor series. Available in 3 different models that feature reverse flow water current for maximum water and Co2contact time with the coral media. All models come with PH probe holders to monitor Ph levels in the main reactor chamber and built in bubble counters to monitor Co2 drip rates.To help you meet the challenging task of maintaining alkalinity, calcium and trace elements , consider adding a Reef Octopus calcium reactor to your aquarium system.

How it works

A calcium reactor is essentially a chamber full of aragonite, which is the crushed skeleton of ancient hard corals. Aquarium water is pumped through this chamber along with pressurized carbon dioxide (CO2). The CO2 lowers the pH in the chamber to an acidic level which dissolves aragonite media into the aquarium water. In addition to dissolving the calcium, this process also dissolves nearly all the minerals and trace elements the coral used in order to grow.

Automated Calcium and Alkalinity supplementation - When set up properly and used correctly, a calcium reactor can maintain or increase calcium levels with little to no maintenance.


- 120 Gallon- Light Demand 100 Gallon- Medium Demand 75 Gallon- Heavy Demand

Techinical Specs

Body Size: 4in 
Footprint: 9.5in x 7.5in
Total Height: 20in
Media Capacity: 1.5L (.39gal)
Inlet Size: 1/4in
Max Feed Rate: 150GPH
Note:Suggest a feed pressure slightly higher than a full flowing influent

Recirculation Pump Information

Reef Octopus Aquatrance 1200 water pump
Wattage: 15w

Warranty -1 year warranty on pump and 1 year on reactor body

Additional Information

Additional Information

Manual No
Product Specs


Manufacturer Reef Octopus


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