I am brewing 10 gal IPA split into 5 gal batches with 2 different yeasts. I just added gelatin and started cold crashing at 33 F. The last few times I cold crashed, the bottle contracted due to the cold. This time, however, both bottles have not changed one bit. I am using big mouth plastic bubbler from Midwest Supply. I am worried that they were not sealed well and sucked in air. I could not tighten the lid more and I could not get the rubber stopper/airlock in any tighter. I am using a 3 piece airlock btw. Should I stop the cold crash and transfer to kegs now and then continue the cold crash? Or should I not worry about it. I started the cold crash Thurs night and plan on transferring to kegs on Tues. Anyone had this happen and not oxidize the crap out of your beer?
I don't cold crash often, but I generally just take the airlock off and put some aluminum foil over the bung hole. I don't think there's a way to prevent air from getting sucked into the fermenter, as chilling creates a vacuum. It would be cool to see someone hook this up to a CO2 tank though.
