On the fence about using yeast slury....

Panderson1

I am not too experienced on reusing yeast.
Yesterday, I kegged a hazy IPA (closed transfer) from a fermzilla conical. I left the yeast on the bottom of the empty firmzilla with a 1 inch layer of beer on top (hope that makes sense). No oxygen entered and should be all CO2 inside. Still a little pressure inside the firmzilla too... so the yeast has been sitting 30 hours in an empty fermenter but with no oxygen.
Anyways, i was thinking of using that yeast for a brew i did today (chilling down currently).
Any harm in this? It was Verdant IPA dry yeast originally fermenting the hazy.

DBhomebrew

Carry on.

Kickass

I do it as often as possible. Yeast is expensive and this is an easy, safe, and effective alternative to buying new yeast every batch.
I typically split my yeast into two mason jars. Then pitch one jar into my next batch. I’ll do this “doubling” 2 or 3 times
Word of caution: if the previous batch is a bigger beer, your yeast could be a little to worn out. If the previous batch OG is above 1.060 I don’t repitch.
If you go from hoppy to something not hoppy, you could get some carry over flavor you don’t want.

Panderson1

Hmmm. So the hazy (previous batch) was 1.070. This one is 1.068...... both IPA tho....
I have some us-04 ready to go. Just wondering the best option

Kickass

Since it’s a very fresh batch of yeast, I don’t think it’d be quite as big of a deal. Honestly, if me, I’d probably still reuse it.

Panderson1

Thanks. I did it.... i feel like i added a lot to this next batch lol....
On top of that it seems like i had $100 worth of yeast that i am dumping lol... see pics. I'm dumping into A bucket of ice. Looks gross!
Crazy!

Kickass

Yep, I hate dumping yeast when I don’t have to. I dumped some last weekend because I didn’t have time to save it. I’m still thinking about that.

Oleson-M.D.

We harvest and reuse our yeast slurries with every brew. I just dumped over 1 gallon of good Diamond Lager Yeast, only because it was many, many generations old. Maybe 30 brews were made using this yeast.
Figured it was time to start over with a first generation yeast.
Not only do you save $$$, but the quality of the yeast will improve up through the 8th or 9th generation.

hottpeper13

Didn't have a beer to repitch the Voss I collected so I brought it upstairs into the kitchen for bread baking season. Down the drain sucks.

aceluby

I keep as much yeast as I can. Only time I'll toss it is if I've already got a bunch of the same yeast in the fridge or there is too much dry hop sludge (which is one reason I stay away from dry hopping these days). I lost count at what generation I am for some Lutra I got 6 months ago, but at one point I had so much of it that I just had to toss out a few batches. I even save the dry yeast pitches and even those have never failed me on repitching.