Originally Posted by VCTFernandes
You can also use vacuum in order to pull the CO2 out of solution, which works very well in my opinion...
Vacuum will be the most efficient, how easy it is depends on the kit you have access too.
Vacuum racking will remove some of the dissolved CO2 (carbonic acid). You can also just manually rack and use a vacuvin
pump. That needs to be used on a "per bottle" basis.
pump (or similar device) can be used on larger amounts. It's just connected to a holed bung and piece of tubing (of appropriate size). That'd work on 1 gallon carboys (glass, vacuum doesn't like plastic fermenters), probably fine with a 3 gallon size carboy as well. How well it would do with 5 gallon or larger I don't know.
Or you can rig an enolmatic vacuum bottler
to either vacuum rack or to degas directly, same applies as with the mityvac i.e. appropriate size tubing and holed bung. It would be quicker as the machine does all the work. The same applies to a proper vacuum pump of course.
It's all relative as to how much you have to de-gas at a time as well as the size of the fermenter.
Of course, other, manual methods work too, but unless you can shake the hell out of a 5 gallon fermenter with a sealed bung, or you want to chance introducing the possibility of air/O2 exposure with a "wine whip" type agitator, then machinery of some sort is probably the best option, just up to the individual as too how much they want to spend.