Homebrewing Stack Exchange is a question and answer site for dedicated home brewers and serious enthusiasts. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Is there a maximum time I can keep the sanitizer liquid inside the fermentation containers? Would it be OK if I fill them with it and store them for a while, like a couple of weeks?

If not, would it be OK for a few days. Sometimes I fill them with the sterilizer to start some brewing, but then something else comes up and I don't find time to return to it until the next weekend.

I saw that the sanitizer powder tends to fall out from the water after I while and then just lies on the bottom of the container. Sometimes I stir it, to mix it again.

share|improve this question
up vote 6 down vote accepted

If you're using a powdered sanitizer, like One Step, it doesn't respond well to storage. It's a percarbonate based sanitizer that depends on O2 to work. If you store a mixed solution long, the O2 bubbles out making it unreliable. If you use Iodophor, you can store it for a week or 2 until it loses its color. It you use StarSan and mix it with distilled water, you can keep it almost indefinitely. I've had some in a spray bottle for 2 years and it was still good. So the answer basically comes down to depending on what sanitizer you use, how you mix it, and how you store it.

share|improve this answer
At the moment I use "VWP sterilizer" which is a white powder. – Martin Scharrer Apr 14 '11 at 20:47
See my answer to your other question. – Denny Conn Apr 14 '11 at 22:06
Thanks, I already saw it. I will try to change the sanitizer. – Martin Scharrer Apr 14 '11 at 22:08

What I usually do is to clean my carboys right after I rack the beer into the next container. I find it's easier to scrub out the sticky bits if you clean right away. After the cleaning, I don't sanitize, and then I store the carboy upside down with a piece of paper towel on the bottom to catch any leftover liquid. Since I keep it closed up in storage, I can keep it free of dust for the next batch. When I brew again, then I do a quick rinse and sanitize it before use.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.