I maintain adequate water stores at my house in three ways. First, I usually keep about 30 gallons of water in a combination of 24 oz, 1 gal and 2.5 gal drinking water containers. We rotate through this on a bi-monthly basis, added to this we have a significant amount of Gatorade Endurance on hand as well. Second, I have 10, 5-7 gallon water container that contain RO filtered water and water stabilizer (similar to what Red Flare is selling). These are cycled about every year as they are the water containers I bring to events and camping with me. Finally, I did what Doug suggested... Upgraded to a 80gal water heater and added a second one… so I have 160 gallons of clean water in my garage that is cycled daily!
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"Trust in God --and press-check. You cannot ignore danger and call it faith." -Duke