AquaMaxx CR-1 Calcium Reactor

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This item has been discontinued.


AquaMaxx Calcium Reactors use an upflow design to mix saltwater, calcium carbonate and CO2 inside a reaction chamber to eliminate the need for daily two-part dosing. Not only will the AquaMaxx Calcium Reactor keep your levels balanced, you will no longer have to calculate daily dosages for your tank.

AquaMaxx Calcium Reactors are computer-precision engineered and utilize the latest aquarium technology to deliver unparalleled performance and value. The CR-1 is rated for aquariums up to 350 gallons yet is thin enough to be concealed underneath your aquarium or inside the sump.

AquaMaxx Calcium Reactors were designed from the ground up with the aquarium hobbyist in mind.

The computer precision-cut enclosure makes the reactor look and feel seamless. There is only one cord on the reactor: the power cord. With the fittings and pump on the same side, everything stays neatly organized.

Cleaning and maintenance is simple. For quick access to the included Sicce pump, simply unscrew the union. You do not need to replace media too often with a reaction chamber this size but, when you do, it could not be easier. Just turn the thumbscrews counterclockwise, remove and replace the sponges and replenish the reactor with quality calcium carbonate media.

Monitor your AquaMaxx Calcium Reactor’s pH by placing a probe into the built-in probe port. A bubble counter is also included so you can monitor the amount of CO2 gas inside the reactor.

The workhorse powering the AquaMaxx Calcium Reactor is the pump. Each reactor is equipped with an Italian-imported Sicce Syncra CR-1 Silent 1.5 pump. These pumps were specially chosen for their small footprint, energy-efficient design (a mere 23 watts) and whisper-quiet operation.

AquaMaxx Calcium Reactors are shipped with detailed instructions and diagrams to help you get up and running quickly. All AquaMaxx products are backed by a 90-day manufacturer warranty.

  • High quality acrylic construction ‚ High quality SCH80 fitting
  • Highly Efficient, Durable, Reliable
  • Simple to Set Up and Operate
  • Up flow design
  • Clear cast acrylic accurate CO2 bubble counter
  • Thumbscrews for easy removal of lid ‚ Easy to clean!
  • Includes PH probe holder for PH monitor
  • Easy removal of pump with union coupling for maintenance
  • Co2 mixes with water pump intake
  • Over height: 22 inches
  • Pump: SICCE Syncra silent 1.5
  • reaction tube diamter: 4.8 inches
  • Chamber capacity: 3.5 L

Product Manuals & Documentation

AquaMaxx CR-1 Calcium Reactor

Owner's Manual available for download in Adobe PDF file format

Manufacturer Info

AquaMaxx is a Southern California-based aquarium supply company that entered the market in mid-2008 with a line of affordable metal halide bulbs. The brand quickly gained recognition as word spread about the high quality and low cost of their lamps. In 2009, AquaMaxx released a line of aquarium filter socks and, in early 2010, unveiled an assortment of high-performance protein skimmer accessories and upgrades.


AquaMaxx Limited Manufacturer Warranty
AquaMaxx will warrant all AquaMaxx products to be free from manufacturing defects for one year from the original purchase date when purchased through an authorized AquaMaxx retailer. This warranty does not cover any damages caused by misuse, neglect, alterations or improper handling/transport/maintenance/installation. AquaMaxx does not cover personal injury, personal loss, or other damages associated with the use of these products.



Experience Level: Intermediate

Great Product

Been using this Reactor for about 9 months and it has worked flawlessly. No leaks on mine. Highly recommend this reactor.

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Jason from CT


Experience Level: Intermediate

Great price, but LEAKS!

Great Calcium Reactor for the price. Easy setup. Biggest complaint is that the pump and plumbing connected to the pump input and output LEAK. After a couple months of having this running, this is leaking so bad that I am going to have to empty it and see if I can epoxy the pump to prevent further leakage. Not Ideal if you are running this externally. I would only recommend this if you know going into the purchase that you will have to epoxy the pump and plumbing before you can use it.

4 out of 4 found this review helpful

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Experience Level: Expert

Great Price!

Great Reactor!!! I bought this reactor to replace an old one. It was easy to set up and so far I am extremly happy with it. The only problem I had was a small leak where the union was glued to the pump inlet. A small dab of epoxy and the reactor is working great! Other reactors say 6" wide by 24" tall And those are outside measurement. This on was alot larger than I expected. Anyone looking to upgrade or buying for the first time this is an awesome reactor at half the price of others.

9 out of 9 found this review helpful

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