Is this yeast ok to use?

[Jloewe]

Quick and dirty if it. Want to make a dunkleweizen when I have vacation in October.

Saved some Hefeweizen yeast from a batch in June.

My procedure was as follows. I wasn’t expecting to save anything but changed my mind last minute. Starsaned a foam cup and poured in slurry. I always keep a couple cleaned soda bottles just in case, so poured it in a clean and starsaned bottle.

Started with a loose cap tightened it up later.

Can I use this yeast or should I buy new? Never reused yeast before.

 

[shoreman]

I’d make a starter to see if it’s worth adding to 5 gallons. You should be able tell if the starter is off.

 

[Hoppy2bmerry]

Yes, pour off a little of the beer covering the slurry, and taste it. Not sour or funky in any way no problem. Making a starter is a good move.

 

[Protos]

Year after year, I've been getting regretful brews when trying to reuse yeasts harvested in summer. Given my sanitation protocol was the same throughout the year and I got infected starters only in summer, I came to suspect it's not about my sanitation practices but rather about airborn microbes blooming in the warm season and somehow finding their way into my harvested yeast. So, I don't harvest yeasts in summer anymore.

In different climates and locations things could be quite different, of course.