(1 customer review)


The CR618 will hold 12 pounds of large grain media and is suitable for reef aquariums up to 300 gallons.




SKU: CR618 Category: Tags: , , , Product ID: 1735



  • 6″ diameter reaction chamber
  • All cell cast acrylic construction
  • 3/8″ thick flange, lid and base
  • Key hole slot for lid removal
  • Full access to the reaction chamber
  • Micro ball valve
  • Sicce Syncra 1.5, bolts to base plate
  • pH probe port in lid
  • pH probe adapter included
  • Auto fill bubble counter
  • 11 x 10 foot print, 22″ overall height
  • Comes with tubing harness shown in picture
  • Now comes with push to connect fittings.

Additional information

Additional Accessories

None, Add high grade check valve for $19.99

1 review for GEO CR618 Calcium Reactor


    The craftmanship and design is second to none . You can’t go wrong buying a GEOs calcium reactor. For a fraction of cost along with aquarium plants regulator or a custom dual gauge regulator with quality solenoid and a peristaltic continuous duty pump, you have an amazing reactor that can rival even the best of Dastaco .

    Thank you GEO for making such an amazing product that too in USA !!!

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