"Say you have (or found) a water buffalo. 400 gallons, how are you going to insure the water in it is potable? Just because you filled it with tap water doesn't mean it will stay clean."

start a fire under it and bring it to a boil..

seriously if one want to treat a 55 gal barrel of rain water how many pool tablets would it take?

We've been fighting for a long time. We are outnumbered by the machines who are working around the clock, without quit. Humans have a strength that can not be measured. This is John Connor. If you are listening to this, you are the resistance."