04-27-2017, 08:31 AM
Just off the top of my head I would say that the corrugated steel catchment tanks are fairly bullet proof compared to a $200 swimming pool. Like an order of magnitude better. Of course you pay for it. I bought a 10,000 gallon tank that is 15' in diameter and 7' tall, with no cover, for just under $3,000. I have stretchy shade cloth over the top. I'm satisfied with the set-up although if I had more money I would have gone with a ferrocement tank for bulk storage and a poly tank for the cleanest water just prior to drinking. I can believe that the ferrocement tank with an integral cover would withstand a pretty good earthquake. I also have a fair amount of confidence in the poly tanks.