MitchBastard Posted August 13, 2019 Share Posted August 13, 2019 reading that when crashing, the fermentor will suck in air via various openings that co2 usually escapes from?? Yeah/nah? surely there wouldn’t be much oxygen in a fridge space? This introduced oxygen can potentially lead to oxidation? Yeh/nah? can I just do up my FV lid nice and tight and plug up the hole to avoid this? Yeah/nah? will my beer explode if I do this? Yeah/nah? Is it beer o’clock yet? Yeah/yeah? 1 Link to comment Share on other sites More sharing options...
Mikes15 Posted August 13, 2019 Share Posted August 13, 2019 (edited) 17 minutes ago, MitchBastard said: reading that when crashing, the fermentor will suck in air via various openings that co2 usually escapes from?? Yeah/nah? surely there wouldn’t be much oxygen in a fridge space? This introduced oxygen can potentially lead to oxidation? Yeh/nah? can I just do up my FV lid nice and tight and plug up the hole to avoid this? Yeah/nah? will my beer explode if I do this? Yeah/nah? Is it beer o’clock yet? Yeah/yeah? Yeah, but very little & Co2 created during brewing will still sit below the O2 protecting the beer, what do you think happens when you bottle! Maybe, 21% O2 in air so if you have 100L of free air space in your fridge you have 21L of O2, Nah, O2 is lighter than Co2 as above, yeah, you could try if it makes you happy, Nah, vessels under vacuum implode not explode! Nah, Im on nigth shift later Edited August 13, 2019 by Mikes15 1 Link to comment Share on other sites More sharing options...
Otto Von Blotto Posted August 13, 2019 Share Posted August 13, 2019 (edited) It will but in my experience it won't do any harm. Cold crashed probably over 100 batches so far and none of them exhibited the tell tale oxidation signs. I wouldn't do up the FV airtight. The pressure drop from the drop in temperature might cause issues in an airtight vessel. You won't have a CO2 blanket over the beer, the air will simply mix with whatever gases are already in the headspace, and a small amount of it probably gets reabsorbed into the beer, but as above it is highly unlikely to cause any problems. If it did regularly cause issues then it wouldn't be a very popular process. Edited August 13, 2019 by Otto Von Blotto Link to comment Share on other sites More sharing options...
MitchBastard Posted August 13, 2019 Author Share Posted August 13, 2019 @Mikes15 Link to comment Share on other sites More sharing options...
ben 10 Posted August 13, 2019 Share Posted August 13, 2019 If you buy a nitrogen cylinder you can flush the fridge with that and avoid the problem. I have been doing that for years. nah. 4 Link to comment Share on other sites More sharing options...
ChristinaS1 Posted August 14, 2019 Share Posted August 14, 2019 On 8/12/2019 at 10:49 PM, Ben 10 said: If you buy a nitrogen cylinder you can flush the fridge with that and avoid the problem. I have been doing that for years. That is a long time. So you found it did make a significant difference Ben? Cheers, Christina. Link to comment Share on other sites More sharing options...
ben 10 Posted August 15, 2019 Share Posted August 15, 2019 On 8/13/2019 at 11:49 AM, Ben 10 said: nah. You missed that bit mate. 2 Link to comment Share on other sites More sharing options...
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