Common Beer Off Flavours – Metallic, Copper, ink and blood
Off Flavour: Metallic
Chemical Name: Ferrous Sulphate
What to taste or smell: Tastes of metal, copper, ink or blood. The best way to identify this is to rub a bit of beer on the back of your hand. This gives off a strong metallic odour and sensation.
When does it occur: Poor quality metal work, piping or via packaging (bottle caps, kegs or cans). Make sure your mini kegs have a passivated coating (ours do). Grains that aren’t stored correctly or are old can also impart metallic off flavours.
Will it disappear over time: No, it will likey increase with aging.
Tips on how to reduce Ferrous Sulphate:
Remove metal ions by treating your brewing water
Use food grade plastic, glass, or stainless steel to store both your fermenting and finished beer.
Replace corroded fittings and fixtures immediately
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