Frozen food should be stored at 0°F (-18°C) or lower. The freezer temperature should be checked periodically with an appliance thermometer to ensure it remains at the proper temperature. It is important to keep the freezer at the correct temperature to prevent the growth of harmful bacteria and to maintain the quality of the food. Freezing inactivates various microbes and slows down enzyme activity, which helps to keep food safe and maintain its quality. While frozen food will remain safe indefinitely at 0°F, its quality will decrease the longer it is stored in the freezer. It is recommended to use frozen food within a reasonable amount of time to ensure its quality.