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UNS Pro Dual Stage CO2 Regulator

Original price $ 219.99 - Original price $ 219.99
Original price
$ 219.99
$ 219.99 - $ 219.99
Current price $ 219.99

UNS PRO Dual Stage CO2 Regulator

**This item qualifies for free shipping**

The UNS Dual Stage CO2 Regulator contains two gauges to show both working pressure and gas pressure in your tank. Available in a new finish, the beautiful space grey color looks great in the cabinet and this unit also prevents the end of tank dump with a built-in failsafe mechanism! The new feature includes the convenient bubble counter manifold that allows the user to easily split CO2 supplies between multiple planted aquariums. 

Package Includes:

  • UNS Pro Dual Stage CO2 Regulator
  • 2x Bubble Counter Manifold Blocks
  • Select Tools
  • Power Adapter
  • Assorted extra washer o-rings

There are two basic requirements for plants to grow through photosynthesis; nutrients and light. The most important nutrient for plant growth is carbon. Since carbon dioxide (CO2) is abundant in the atmosphere, plants simply draw their carbon directly from CO2 in order to photosynthesize and grow.  In an aquarium, CO2 levels are naturally very low and without any supplementation, submerged aquatic plants will not be able to grow properly. When CO2 is a limiting factor, plants cannot fully utilize all the available light to photosynthesis. This can allow algae to grow and compete with the plants for nutrients, further stunting plant growth. By introducing CO2 into the aquarium, plants can achieve healthy growth faster and therefore outcompete algae. 

The introduction of carbon into an aquarium is typically achieved by using a pressurized gas tank controlled by a regulator, solenoid, and needle valve.  Pressurized CO2 is the best way to go for the more advanced hobbyists or for those keeping larger aquariums, 20 gallons, or above. 

The CO2 regulator is one of the most important aspects of any CO2 system. The pressure in a gas cylinder can be over 700 psi which is way too high for safe usage in any application. The regulator plays the crucial role of allowing just enough CO2 to dispense safely through the airline tubing, through the diffuser, and into your aquarium.  


  • Adjustable working pressure up to 5 Bar/ 70 PSI
  • CGA320 thread connection stem adapter included (fits onto standard US CO2 gas tanks only)
  • Built-in solenoid allows you to turn the CO2 supply on and off during photoperiod
  • Bubble counter manifold allows splitting of CO2 into multiple tanks
  • Adjustable knob allows the ability to adjust working pressure
  • No end of tank dump

What else do you need to get to supply CO2 to your aquarium?

- CO2 Tubing

- Diffuser

Check Valve

Additional Manifold

Additional Specifications:

Output pressure gauge: 0-160 PSI

Tank/high-pressure gauge: 0-4000 PSI

Pressure Relief Valve: 100 PSI