K
KernelCrush
I've heard StarSan effectiveness is only pH-dependent on 2 different interviews with a rep from Five Star. One said its still good below 3.5, the other said 3.0. You can find the interviews
http://thebrewingnetwork.com/shows/The-Sunday-Session/The-Sunday-Session-03-19-06-Sanitation-w/-Charlie-Talley
http://beersmith.com/blog/2013/08/02/beer-cleaning-and-sanitation-with-jon-herskovits-beersmith-podcast-62/
I found this one a bit of a (sales hat) stretch, the interviewee fell just short of claiming it cures cancer.
Below is a snip from an email received from them late last year.
First of all, thank you for contacting Five Star Chemicals and for bringing this matter to our attention. The head chemist and I looked over the information you sent and we want to replace the new bottle of Starsan you purchased. Starsan has a shelf life of about 12 months, which may account for the cloudiness from the older bottle of Starsan. However, based on your water profile, nothing indicates that the newly acquired bottle of Starsan would produce cloudy solution as well. Because of this we want to ship out to you a replacement bottle; please let me know the size of the bottle and your shipping address. We can include in the package a return label if you don't mind sending us back the bottle we're replacing for the chemist to run some tests and quality control checks. I sincerely apologize for any inconvenience this may have caused. You are correct that as long as the solution maintains the pH of 3.5 or below, it is working as intended. But since this case seems to be a bit of an anomaly we are more than happy to replace your Starsan which should eliminate the cloudy solution problem. We greatly appreciate your business and I look forward to hearing back from you so we can get your product replaced!
http://thebrewingnetwork.com/shows/The-Sunday-Session/The-Sunday-Session-03-19-06-Sanitation-w/-Charlie-Talley
http://beersmith.com/blog/2013/08/02/beer-cleaning-and-sanitation-with-jon-herskovits-beersmith-podcast-62/
I found this one a bit of a (sales hat) stretch, the interviewee fell just short of claiming it cures cancer.
Below is a snip from an email received from them late last year.
First of all, thank you for contacting Five Star Chemicals and for bringing this matter to our attention. The head chemist and I looked over the information you sent and we want to replace the new bottle of Starsan you purchased. Starsan has a shelf life of about 12 months, which may account for the cloudiness from the older bottle of Starsan. However, based on your water profile, nothing indicates that the newly acquired bottle of Starsan would produce cloudy solution as well. Because of this we want to ship out to you a replacement bottle; please let me know the size of the bottle and your shipping address. We can include in the package a return label if you don't mind sending us back the bottle we're replacing for the chemist to run some tests and quality control checks. I sincerely apologize for any inconvenience this may have caused. You are correct that as long as the solution maintains the pH of 3.5 or below, it is working as intended. But since this case seems to be a bit of an anomaly we are more than happy to replace your Starsan which should eliminate the cloudy solution problem. We greatly appreciate your business and I look forward to hearing back from you so we can get your product replaced!