I am sorry your link didn't work so here is the skinnyFiltration methods, storage tips, how to calculate the right amount of water to store and a complete glossary of water treatment terms.
Water Filtration, Purification and Storage - The Prepper Post
I agree that water storage alone won't do you much good for long term but it can be valuable for a short term weather event or in the early stages of a long term event.I am sorry your link didn't work so here is the skinny
You need a way to purify water from the start, storing water isn't a reliable prep unless you plan on only a 2-3 week problem which isn't realistic.
1. Get Berkey water filtration system (google it, not hard to find)
2. If you think $300 isn't worth your families life than buy several gallons of Bleach, and learn how to use it to disinfect water. It isn't hard and it isn't expensive but it will only endure until your bleach gives out.
3. Storing water is a pussies game as you will outlive your stocks in a few weeks.