Bests & Worsts Reviews from Amazon

The basics of water storage are to keep it in water-safe, opaque containers, out of the light, and away from any chemicals (e.g., gasoline, paint, etc.). If you do this, water will typically remain safe for 6 months to a year. It's difficult to predict precisely since many factors, such as temperature and initial impurity levels, can affect the shelf life. So, if you're only storing a few jerry cans of water, simply pour them out and refill every six months. However, if you're going to store larger containers of water, such as a 55-gallon drum, or a SuperTanker, then you will likely want it to last longer than six months. This concentrate contains proprietary stabilized sodium hypchlorite, NOT ordinary household bleach as the other reviewer suggested. Think of it as bleach that continues to be slowly released over time. Experts recommend replacing normal bleach-treated water within a year. This product pushes that shelf life from 5-10 years. Not bad if you're stocking water for emergency reasons. Do be aware, however, that treating water with bleach of any sort will introduce a chemical smell and taste - can be objectionable to finicky drinkers (such as children). I would refer skeptics (or any potential purchases) to the company website (waterpreserver dot com). They discuss the testing and certification, and it should help you better understand the benefits of this product. Obviously look around for the best price. Written by Arthur Bradley, author of "Handbook to Practical Disaster Preparedness for the Family." Please be kind enough to indicate if reviews are helpful.