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Old 07-14-2010, 12:43 AM   #1
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Default O2 instead of CO2 - is it possible?

I don't know how this beer turned in a matter of 2 days in the keg. I also have and ESB that has the same flavor. I just drew a pint of an IIPA that we were drinking this weekend that tasted great. Now it tastes like cardboard. Same with the ESB. Is it possible that my tank was filled with 02 and not CO2? I just can't understand the sudden change in the keg. Or am just down to the dregs?

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Old 07-14-2010, 12:45 AM   #2
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did you force carb with the same tank? and i have never had the dregs taste worse than the first part of the beer

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Old 07-14-2010, 12:51 AM   #3
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Yes. Same tank. Unless it is physically impossible to fill a C02 tank with O2, I'd swear those bastards fvcked me.

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Old 07-14-2010, 01:02 AM   #4
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thats weird you would think that the beer would taste bad the whole way thru if it was carbonated with it. couple things are the bubbles normal Co2 bubbles bigger smaller etc. you could always take the regulator off and open up the the tank upside down into a cloth bag ( crown bags work good for this ) and see if you get dry ice. where 02 will just be cold. another way to test probably safer too is carbonate some water and see if you get the carbonic bite that c02 produces.

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Old 07-14-2010, 01:21 AM   #5
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I don't know. Maybe it is just the dregs, but it really turned in this last two days. But I don't know how I would taste oxidation, just yeast. I've never had a beer do this.

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Old 07-14-2010, 01:25 AM   #6
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Do you have a high pressure gauge on your tank? If it's showing more than 7-900 PSI, something's going on. O2 is stored as a high pressure gas, CO2 is stored as a liquid.

It's not very likely at all that they filled it with O2. I don't think the beer would have "carbonated" correctly with O2 for one thing. I'm not even sure if CO2 tanks are made to handle that kind of pressure for another.

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Old 07-14-2010, 01:43 AM   #7
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Yep, it's at 1100 PSI. I've noticed it's stayed in the green for a long while.

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Old 07-14-2010, 01:51 AM   #8
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1100? You're not storing this at 90F are you? That's above the critical pressure of CO2.

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Old 07-14-2010, 01:53 AM   #9
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Yes, it's pretty much above 90 degrees in my garage every day...it's hot. But the gauge is still reading in the green.

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Old 07-14-2010, 01:58 AM   #10
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Supercritical CO2 (above 88F) is going to have different properties than the gas we normally use. I wonder if that's what's doing it. As I said, I don't know if the bottles are rated for it, either. There have been stores of tanks venting from too high of pressure, which is going to go up exponentially above 88F.

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