Glass Carboy 5 Gal. Used for secondary fermentation , that is, to transfer the beer from the primary fermenter and let it age and continue to ferment for an extended period of time. This bottle allows the beer to be exposed to a minimum of air and also it allows you to watch your beer ferment and clear. If you are going to own a carboy you are going to want to own a carboy brush. However, you may choose to not have your brewing be an exact science and that's fine, there are alternatives to the use of a thermometer which we detail in our step by step instructions.
Specific gravity is a measure of the sugars taken before and after fermentation.
Each recipe may have a target specific gravity for you to achieve. This is not always necessary and that is why the hydrometer has ended up in this section. And as for specific gravity, it is not the only way to know when your beer is finished fermenting. It is a fine instrument but not an essential one. They come in cases of 12 and they are clean.