Originally Posted by brewkinger
May seem like a redundant question as I am sure that if i glanced through every thread I could find the answer.
In one of the many videos on brewing or literature that I have read, i seem to remember that I can mix a batch of sanitizer up in a large bucket and use it over and over again??
Is it only a certain kind of sanitizer that this can be done with?
When will it expire? Can I test the effectiveness (it seems that I can remember them testing the pH)?
it has to do with pH but I can't remember what's it's supposed to stay below... 3.8 maybe?
I make up a one gallon batch of StarSan sanitizer at a time, store in an old water bottle, and use that maybe up to a month. I also keep a spray bottle and use that about a month or so. I never check the pH.
edit: i don't "re-use" the sanitizer though - I pour out relatively small quantities as I need them and discard those small amounts when I'm done with them for a day.