Here is a great link that will help you understand how to store long-term food storage in food grade plastic buckets by adding dry ice. The LDS church recommends that you NOT stack 5 or 6-gallon plastic buckets more than 3 high as the lids can crack over time. Also do not store them directly on the floor. They need to be at least 1/2″ off the floor to allow air to circulate. Go here for the handout, and click on Plastic Buckets. You will also find other storage information.
I recently knocked the wall out underneath my stairs. I plan to store my wheat buckets there. I set large tiles down to cover the cement floor. Do you think I still need to raise the buckets up?
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