3.9 lbs of barley * 0.35 oz of yeast * 1.06 oz of hops * 2.1 oz of regular sugar (towards the end of the process) The equipment: a thermometer, a hydrometer, a large pot, and a bucket for filtering.

Tracking fermentation normally involves a simple yet critical piece of equipment called a hydrometer (shown left), which measures the specific gravity or relative density of a liquid.