Changes

Boiling is also when hops are added. The brewer will make a hop addition as the kettles are being filled, before the wort actually begins to boil. Other than being aged, the hops are usually Belgian, Czech, or German grown hops typically of (note that many modern Belgian grown hops are varieties which originated in the Hallertauer varietyUK). It is important to use hops with low alpha acid content as brewers are not looking for bitterness or acid contents; only the antimicrobial properties contained within the hop. This will prevent undesired molds and bacterias such as acetobacter from inhabiting the wort.