Add two drops of Part A with two drops of Part B in a shot glass.  Swirl around briefly. Let sit to activate for 30 to 60 seconds.  Add to 16oz of water.  Adjust ratio of drops for larger quantities of water.

Keep both bottles in a cool and dark place.  Do not let sit in direct sunlight.  Best in a pantry or in the refrigerator.

No, as long as it is stored correctly, the components will always stay fresh and will activate normally when mixed together.

If the water treated is stored without sunlight exposure, air exposure or temps over 75 degrees Fahrenheit, the water can stay clean for approximately 4 years.  If the water is exposed to the above elements, treat the water again with the same recommended protocol.