• Capacity: Up to 300 gallons
  • Pump: SICCE Syncra 0.5
  • Height: 20.5"
  • Reaction Tube Diameter: 4.3"
  • Chamber capacity: 2.9 L
  • Footprint: 8.3" x 9.1"


JNS cTech T-1 Calcium Reactors use an up-flow 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 JNS cTech T-1 Calcium Reactor keep your levels balanced, but you will also no longer have to calculate daily dosages for your tank.
With a seamless body, removable lid for quick media access, and small, space-saving design, the JNS cTech T-1 Calcium Reactor is truly one-of-a-kind.

Computer-Precision Engineered

JNS cTech T-1 Calcium Reactors are computer-precision engineered and utilize the latest aquarium technology to deliver unparalleled performance and value.
Despite its small form factor and compact footprint, the T-1 is rated for aquariums up to 300 gallons.

An effective and convenient inlet filter helps to trap particulates, extends the life of the pump and makes tuning the effluent drip rate as easy as possible.
The high-quality pinch value allows for precise effluent control.
Simplified inlet and outlet designs also improve efficiency.
The unique pump baffle enclosure helps to minimize noise.

With a built-in pH probe holder, you can easily keep an eye on the pH inside the calcium reactor with a pH monitor or control the CO2 with a pH controller.
A CO2 recovery system re-injects excess/unused CO2.
This helps lower CO2 usage and minimizes excess CO2 from going back into your aquarium.


JNS Calcium Reactors were designed from the ground up with the aquarium hobbyist in mind.
The computer precision-cut enclosure makes the reactor look and feels seamless.

Cleaning and maintenance are simple. Thumbscrews and keyhole flanges allow for easy removal of the lid.
The workhorse powering the JNS cTech T-1 Calcium Reactor is the pump.
Each reactor is equipped with an Italian-made Sicce Syncra 0.5 pump.
These pumps were chosen specifically for their small size, energy-efficient design, and whisper-quiet operation.


  • High-quality cell-cast acrylic construction
  • Inlet prefilter to prevent clogging
  • Precise pinch valve
  • Pump baffle enclosure to minimize noise
  • Simple to set up and operate
  • The up-flow design prevents clogging and improves water circulation.
  • Accurate CO2 bubble counter
  • Thumbscrews for easy removal of lid ‚ easy to clean and replace media!
  • The reactor can be placed inside your sump or externally.
  • Includes PH probe holder