In this video Okie discusses in depth how to purify bulk water supplies for long term storage using Stock Chlorine. Okie will present the procedure for creating Stock Chlorine from Calcium Hypochlorite commonly known as “Pool Shock” Many people use bleach (Sodium HypoChlorite) to purify water for the short term, but bleach begins to degrade in 6 to 8 months making it a poor choice for long term water stores. This is a cheap and simple process that you will want to add to your preparedness skill-set. The tank in this video was purchased from www.plastic-mart.com