Reef Octopus CR100 4" Calcium Reactor up to 150 Gallons


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.

Reverse flow design

Reef Octopus CR100 Features:

  • 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

Reef Octopus CR100 Specifications:

  • Rated for aquariums up to 150 gallons
  • 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