The airlock, also called a bubbler, is an essential fermentation device that protects your cider from bugs, bacteria, oxygen and other undesirables during fermentation. It allows excess CO2, a byproduct of fermentation, to escape the fermenter while keeping a...
Kits for making hard cider that are available online generally include basic essentials such as a fermenter and airlock but beginners quickly outgrow these setups. For someone looking to make a decent size batch and have more control over their homemade cider, they... 
