Reef Octopus

Reef Octopus SRO CR5000D 8" Calcium Reactor

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


  • 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