Flush the barrels out with bleach water before putting in place then filling. Always use unscented Clorox bleach for purifying water. Rule of thumb is 3 drops of bleach to keep the water clean. You can add that same amount every six months.
Make sure to design the setup that barrels can be refilled plus have to be able to get the water out of the barrels fairly easily.
I would not store any food at all there if there is a rodent problem. Look for alternative places in the house for storing food like under beds.
Make sure to design the setup that barrels can be refilled plus have to be able to get the water out of the barrels fairly easily.
I would not store any food at all there if there is a rodent problem. Look for alternative places in the house for storing food like under beds.