I have a 5 gallon Better Bottle which I can use for secondary on 5g batches or primary on smaller batches. There's no reason a 2.5g batch can't ferment in a 5g pail. I also have a 3 gallon glass carboy which can secondary 3g batches or primary even smaller batches.
I hear people mention the Carlo Rossi wine jugs, but those are only a bargain if you like the wine.
So, I am looking into getting 2, 2.5 gallon jars or mr beer kegs, and the whole purpose it so I can lager in my keezer. I don't have enough space for a 5 gallon carboy/pail, but I could fit 2 jars or mr.beer's in there. My question is, for a lager , if splitting a normal 5 gallon batch between the 2, will there be a lot of blow off?
When I first started brewing, I was told by my LHBS that I should use something with a lot of head space so a lot of my beer won't blow off and be wasted. My concern, is filling 2 2.5 containers will put them almost at the brim, and they will probably end up coming through my airlock. How much beer will blow off? I have been considering 3 gallon plastic jugs that house water for water coolers, but they arent food grade . . .
Edit: I have always used 6.5 gallons for primary, and I have 1 5 gal carboy for secondary, so I have never had to use a blow off rig, and have no experience with it.
I hear people mention the Carlo Rossi wine jugs, but those are only a bargain if you like the wine.
I am not 100% sure what lagering is, as to my understanding it is a slow fermentation and aging process in cold temps.
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