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Reef Octopus Calcium Reactor 100

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Reef Octopus Calcium Reactor 100


For Aquarium up to – 400L

Diameter – Ø100

Footprint – 260x200mm

Height – 500mm

Pump – WB-1000L (15W)

Recommended tank size – 400L

Out of stock

Reef Octopus Calcium Reactor 100



  • Reverse flow and CO2 Recirculating Design
  • Auto Fill Bubble Counter
  • Probe Holder w/Plug*
  • Easy to Remove Lid
  • Precision Effluent Control Valve
  • Solid Construction
  • pH probe not included


The Reef Octopus CR is perfectly capable of meeting the challenging task of maintaining alkalinity, calcium and trace elements on a demanding reef system. Quality, design and controllability define the Reef Octopus VarioS Calcium Reactor series.  All models come with PH probe holder(probe and PH controller sold separately) to monitor Ph levels in the main reactor chamber and built in bubble counters to monitor Co2 drip rates.

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.




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