I'm looking to get into some more detailed preparing. I have my feet wet on my limited budget (college student) and I want to maximize my water storage while minimizing my space. Currently I am looking at getting 1-2 of these: http://www.uscav.com/productinfo.aspx?productid=9556&tabid=1 I hear good things about them, and feel 10 gallons should be good to have on reserve for myself and my girlfriend should the time come that I would need them. My question though is this: If I chose to store ordinary tap water, how long could I expect it to last? Alone? With a bleach additive? How about with a more expensive "water preserving tablet" (I'm not familiar with these but I know they exist). Also, is using ordinary tap water a good idea? If not what is a better alternative. Thanks Wanna kill these ads? We can help!