star san age

[SoCal Surfer]

I filled a 5 gallon water jug with reverse osmosis water and mixed some star san over a year ago. it is crystal clear still with a pH of close to 3. From what I understand, it is till kicking ass as a sanitizer but half of me just doesn't want to believe that it wouldn't degrade with time. Any input?

[BDawg]

star san's effectiveness is due to pH. As long as the pH is still below 3, you are good to go.

[brewinhard]

star san's effectiveness is due to pH. As long as the pH is still below 3, you are good to go.

+1. And that is a good way to get the most out of your star san (distilled, or even RO water for mixing).