Oxygen Stone - 0.5 Micron (1/4 in. Barb)

Oxygen Stone - 0.5 Micron (1/4 in. Barb)

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Better Than Shaking a Keg!
Are you tired of carbonating your beer the unpredictable way? You crank up the PSI in the keg, shake, and wait with bated breath, hoping you didn’t just over-carbonate your batch. Using a diffusion stone pays off with a reliable level of carbonation every time.
Our .5 micron carb stone is ideal to force carbonate your kegged beer, or as an aeration stone prior to fermentation. It produces nice small bubbles, giving more surface area for diffusion. 
  • 0.5 micron stone
  • 316 Stainless
  • 1/2" diameter. Stone is 1" in length. Overall length is 1 7/8"
  • The barb is 1/4" OD
To Use: Attach 2 feet of 1/4" tubing to the stone and the "gas in" dip tube inside the keg. (Tubing not included). Set your desired pressure on the regulator and gas gets emitted through the .5 micron stainless stone. The bubbles rise through the beer creating so much surface area contact between gas and liquid that the absorption rate is very rapid. This is very similar to how beer is carbonated in breweries.
Cleaning & Sanitizing: It is important to know the oils from your skin can clog the small pores in the stone. We that you attach the tubing to the stone, then hold the assembly by the tubing while submerging the stone in boiling water for a few minutes to break down and drive the oils out. When the stone comes out of the boiling water, tightly wrap it in saniitized aluminum foil until you are going to mount it in your keg. 
Item # KEG594
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.19 LBS
Community Q&A

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To oxygenate wort
Sean Smart on Dec 15, 2022
Donald M on Feb 18, 2021
To oxygenate wort
Sean Smart on Dec 15, 2022
it works well with my oxygen concentrator
SCOTT M on Jun 8, 2022
Donald M on Feb 18, 2021
Add oxygen to wort
STEVEN J MASTERSON J on Feb 18, 2021
adding stone to fermzilla 55L
Valued C on Jan 25, 2021
To aerate mouse brain slices in an incubation chamber
Rory M on Jan 15, 2021
I purchased from you before
Craig W on Dec 3, 2020
i need it
Eric W on Sep 8, 2020
To improve carbonation in my kegs
Ariel Zelaya #12645 on Apr 24, 2020
Classy looks
troy s on Mar 17, 2020
to better carbonate my beer.
Gary J O on Jan 21, 2020
Trying lees oxygenation for H2S reduction
Michael Z on Jan 22, 2019
i need one
John N on Oct 4, 2018
To oxygenate wort
Audie S on Jun 26, 2018
want to carbonate the right way
Brian R on Mar 16, 2018
in case of use to carb beer
David B on Feb 6, 2018
Degassing lab samples at a commercial winery
Emily T on Jan 16, 2018
it works well with my oxygen concentrator
SCOTT M on Jun 8, 2022
Add oxygen to wort
STEVEN J MASTERSON J on Feb 18, 2021

4.2 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Carbonation in 3 days not weeks!
I used this diffuser stone with a carbonation lid. I determined the diffusion pressure in water. The keg needs to be between 40 and 32 degrees. I started with the diffuser base pressure and increased by 2 or 3 psi every 1/2 hour. When I got to serving pressure (12 psi), I left the co2 going for 48 hours. My IPA was perfectly carbonated. The last IPA took weeks to reach suitable carbonation. I’m very happy with the stone.
November 21, 2021
over 2 years ago
Rated 5 out of 5
Works Great
After chilling the full keg overnight, I started carbonating slowly using the .5 micron stone. After about 6 hours the keg was fully pressurized and I was able to pour a fully carbonated glass of beer.

This sure beats waiting 5-6 days for the keg to pressurize by simply applying full pressure.
April 21, 2021
over 3 years ago
Rated 4 out of 5
Good product
Good not great, the good part is that it works as advertised, the not so good is that this diffuser stone is priced higher than average. As with any diffuser stone it is IMPERATIVE that you keep it clean before and after use or it WILL CLOG and not work any longer
April 7, 2018
over 6 years ago
Rated 5 out of 5
Does the job
Perfect for hooking up to a tank. Great price!
May 26, 2015
Rated 4 out of 5
Good performance
Great stone to oxygenate your wort when pitching, nice small bubbles. The barb eventually separated but I epoxied it back; used for 10 years and still performing.
May 8, 2015
Rated 5 out of 5
works great
I've used this on numerous batches and never had a problem with it. Good product.
May 6, 2015
Rated 5 out of 5
Fast oxygenation of wort
I have been using one of these for the last 8 years to oxygenate wort at pitching time. The 0.5 micron will filter the oxygen and produce fine bubbles giving more surface area for diffusion. A must have if you use pure oxygen.
May 5, 2014
Rated 4 out of 5
useful device
This is an excellent product at an affordable price.
May 29, 2013
Rated 4 out of 5
Works great
Just keep it clean and boil to sanitize.
May 29, 2013
Rated 2 out of 5
Breaks easily
Ordered one and after a few uses, the barb separated from the stone. Second one now seems clogged.
May 14, 2013