Shelf life of Star San Solution (prepared)

[iahomebrew]

I was thinking about starting to use a spray bottle of star san as I've seen many people use online. My question is, if I prepare the solution, how long can I keep it in the bottle?..without having to constantly make it every time I need to sanitize something whether it be for gravity testing, etc

 

[castillo556]

If you made it with distilled water it will be good pretty much indefinetely

 

[cyanmonkey]

Was just listening to Charlie Talley talk about this. He says as long as it's clear and has a pH under 3.5 you can store it indefinitely in a sealed container.

 

[kh54s10]

If it stays below 3.0 pH it is good. You can buy test strips online or probably at your LHBS. I have a 5 gallon water bottle. I add a gallon and 1/5 ounce of Starsan whenever it is getting low. I fill the spray bottle from it. I have not started fresh for over 2 years.

For me the life of Starsan is way longer than the time until the bottle needs refilling.