From the brew pot to the thermometer, what do you need to brew beer at home? One of the most overlooked materials is quality water. Without it, you could jeopardize the acidity, flavor, and richness of your beer. Hard water contains heavy metals, minerals, and impurities that can make homebrewing more difficult. Luckily, testing your water can give you the results you want (and the peace of mind you need). Here’s everything you should know about how water can affect your homebrew.