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- Sep 8, 2020
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Wanted to test this myself.
I filled my CF15 to 17 gallons of water and hooked up the carbonation stone two ways. First "with racking arm" is the way recommended by Spike. The racking arm is installed in the racking port, followed by the 1.5" butterfly valve, followed by the carb stone. I slowly dialed up my O2 cylinder (regular red cylinder with regulator and HEPA filter) until I got bubbling at the surface and then got my phone and shot a short movie.
I then set it up as described by @Blazinlow86 (version using the valve) - put my sample valve on the racking port just to close it off, put my butterfly on the sample port, with the carbstone on that. Without adjusting the regulator on the O2 cylinder I reattached it to the carb stone and shot the second movie.
To my eye the bubbles I can see are smaller without having the carb stone work from inside the racking arm. I have no way to tell if they are any different down near the stone itself. I think I will give it a try leaving the carb stone attached to the sample port for the duration of the fermentation.
Do you use this to aerate as well? I just used my CF10 for the first time and the large bubbles when using the racking arm seem concerning to me. Not having the same tight small bubbles I typically would get using my wand.