Beer Stone (BS) Remover
Five Star's Beer Stone Remover is an acid cleaner used for stubborn scale or stones.
Use at a rate of 1 oz per gallon of 120-140 F water and allow 10 minutes of contact time, then drain and allow the surface to air dry. Rinse and sanitize just prior to the objects next use. For stubborn scale or stones follow the standard instructions but do not dilute and apply full strength to the area.