Originally Posted by seckert
I hope you are not planning on making 5 gallon recipe kits. if so you need to get a 6.5 fermenting bucket or a 6.5 carboy. you can still use that 5 gallon one you have as a secondary fermetor. but if you try to make a 5 gallon batch in a 5 gallon carboy you will have issues during the active fermentation period.
Question for anyone:
Why can't you make a kit to 4 gallons, ferment it out and then add 1 gallon of boiled and cooled water to get to the intended original volume in a 5 gallon fermenter after fermentation is over.
Many professional breweries ferment higher gravity worts and add water to the finished beer to get it to the right alcohol level.
The water needs to be boiled and cooled to get rid of the entrained O2 in water. If you want to make sure you get rid of any O2 in the carboy, you could add a couple of ounces of sugar to the water to create a little fermentation.
One issue I see is that higher gravity beers produce a lot more esters, so temperature control would be very important. From what I have read, a 2X gravity wort will produce 4X esters.
I am not intending on doing this. I have no need for it. But just wanted to see what folks thought.