is there any general guidance for the volume of gas being sucked back when cold crashing?
E.g. if I have a 6.5g carboy and 5.5g of beer, and I cold crash from 68F to 35F, what volume of gas should I expect to suck-back?
if this is pretty constant and predictable, I'd like to create a large enough "gas reservoir" in my blow-off system to prevent both sanitizer and O2 from pulling back into my carboy.
FWIW, I'm thinking of just creating enough of a "gas reservoir" by lengthening my blow-off tube to provide enough volume.
E.g. if I have a 6.5g carboy and 5.5g of beer, and I cold crash from 68F to 35F, what volume of gas should I expect to suck-back?
if this is pretty constant and predictable, I'd like to create a large enough "gas reservoir" in my blow-off system to prevent both sanitizer and O2 from pulling back into my carboy.
FWIW, I'm thinking of just creating enough of a "gas reservoir" by lengthening my blow-off tube to provide enough volume.