If you have any concerns then contact the manufacturer and ask.

I'm sure they probably have a faq section at their site.

:noel:
GrowRebel Reviewed by GrowRebel on . Pre-Mixed Quick Fix I recently used some Quick Fix that came to me already mixed from keepshootin.com. It said the mixture would stay good indefinitely and also that it could be reheated as many times as necessary. I was just thinking that since real urine grows bacteria after 8 hours, won't the lab notice that my sample isn't growing any bacteria and doesn't smell bad? Rating: 5