Just recently purchased a product that supposedly preserves stored water for five years. https://dryelement.com/collections/w...-defender-2-oz

I have several 55 gallon "Blue" drums and several 15 gallon small "Blue" drums for storing treated water and a dozen 7 gallon containers for collecting river and or city water that will be filtered and treated prior to transfer into the 55 gallon drums and 15 gallon containers. I also purchased those bladders that fit into your bathtubs to collect city water in case of an emergency if there's enough "heads up" time to fill them. https://www.aquapod.us/products/aquapodkit-2-0

Any members here that have used the products that are linked in my post to provide any info on their effectiveness?