Decanting details

Thu Mar 25, 2010 8:27 pm

As I will probably start my starter on Friday late afternoon - on a stir plate and let it run for 18hrs or more and then put it in the fridge Saturday. Sunday is brew day - so I guess I would get the yeast out in the AM and let it come to room temp during the day. Do my brewing. Do any minor temperature adjustments - then decant and pitch.

Sorry for all the questions - I just want to nail this best I can
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Re: Decanting details

Thu Mar 25, 2010 8:36 pm

Old_Skool wrote:As I will probably start my starter on Friday late afternoon - on a stir plate and let it run for 18hrs or more and then put it in the fridge Saturday. Sunday is brew day - so I guess I would get the yeast out in the AM and let it come to room temp during the day. Do my brewing. Do any minor temperature adjustments - then decant and pitch.

Sorry for all the questions - I just want to nail this best I can



what questions? i take from fridge, decant, drink, and if a-ok pitch!
MoRdAnTlY [Mr. Wolf '91 - '12]

Aoccdrnig to a rscheearch at Cmabrigde Uinervtisy, olny the frist and lsat ltteers need be at the rghit pclae. Tihs is becsuae the hamun mnid deos not raed evrey lteter by iteslf, but the wrod as a whloe.
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mordantly
 
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Re: Decanting details

Thu Mar 25, 2010 9:48 pm

mordantly wrote:

what questions? i take from fridge, decant, drink, and if a-ok pitch!



Ok - I assume you're yanking my chain on the drink part :aaron --- but doesn't going from the fridge to 68deg wort shock the hell out of the yeast ?
Old_Skool
 
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Re: Decanting details

Fri Mar 26, 2010 9:52 am

Old_Skool wrote:
mordantly wrote:

what questions? i take from fridge, decant, drink, and if a-ok pitch!



Ok - I assume you're yanking my chain on the drink part :aaron --- but doesn't going from the fridge to 68deg wort shock the hell out of the yeast ?


I don't think he's yanking your chain at all. I taste most of my starters (esp. the multi stepped starters). If you taste it, and there is an obv. infection, you wouldn't want to pitch that into your beer. Granted, starters will can taste very different... so if you don't know what your looking for, you might dump a starter that you didn't need to.

For example. When I do starters, I tend to forget (or am too lazy) to use filtered water. My starter will taste clean, but will definitely be throwing some chloro-phenol off flavors from the chlorine/chloramines in my water. Since I decant this, as long as I know what I'm tasting, I've pitched these starters will excellent results.

Also, if you build a lager starter at 68º, you might get some undesirable fermentation characteristics at the warm temp... but as long as you know what is coming from where, and you're decanting that starter wort, you're still good to go.

That being said, I just did a 4L starter of the Wyeast Munich Lager... and tasted the decanted wort. I was surprised at how clean it was, even though I built the starters in the 68-72 range.

When you pull your starter out of the fridge... decant right there. while the yeast is cold, it will stay packed on the bottome of the flask, and you can decant mostly just wort.

I leave a little wort on top of the yeast, and stir the heck out of it as it is coming up to room temp and/or pitching temp. If I think my starter is a little undersized, I'll even blast the starter once or twice with pure o2 before I even pitch. The yeast as they are coming out of dormancy will suck that o2 up faster than you will believe. (I also oxygenate the wort as well).

In short. For me.

Starter. Pitch. Ferment completely. Fridge (2 days +). Pull and decant. Taste. Warm. (Sometimes o2). Pitch.
:jnj
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Re: Decanting details

Fri Mar 26, 2010 1:44 pm

Old_Skool wrote:
mordantly wrote:

what questions? i take from fridge, decant, drink, and if a-ok pitch!



Ok - I assume you're yanking my chain on the drink part :aaron --- but doesn't going from the fridge to 68deg wort shock the hell out of the yeast ?



I would let the yeast warm up a little bit before pitching, but pitching a colder starter into a warmer wort is better than pitching a warmer starter into a colder wort. Hope that made sense!
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Re: Decanting details

Mon Mar 29, 2010 7:21 pm

sorry to not clarify. i sample all my starters for the possibility of infection. i add a few pellets, so i get a nice idea of what the yeast tastes like. also, i pull the starter from the fridge around the time i get the kettle on the flame.. so it's not quite room temp, but i always get signs of fermentation within overnight. it just seems to me that when the yeast are in my 38F fridge, i slept em. now when they warm up, they want food and oxygen, so why not provide that as soon as there done sleeping?
MoRdAnTlY [Mr. Wolf '91 - '12]

Aoccdrnig to a rscheearch at Cmabrigde Uinervtisy, olny the frist and lsat ltteers need be at the rghit pclae. Tihs is becsuae the hamun mnid deos not raed evrey lteter by iteslf, but the wrod as a whloe.
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Re: Decanting details

Tue Apr 27, 2010 10:31 am

I am planning on brewing a Tripel on Sunday and would appreciate some feedback on the yeast starter process - I have never decanted a starter before. I am planning on adding sugar after 2 days of fermentation, so the yeast can mow through the maltose before the sucrose. I am planning a 3.75 L starter with 2 vials of WLP 530 Abbey Ale Yeast on a stir plate, which is based on mrmalty.com at 1.058 (before the sugar additions) instead of 1.078 w/ the sugar. So, am I better off making the starter tonight, fermenting for 2 days, crashing for 2 days, decanting and then waking the yeast back up, or just pitch the whole thing into the beer? Should I make a 1 L starter on brew day to wake the yeast up or is that not necessary? Thanks! :jnj
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Re: Decanting details

Tue Apr 27, 2010 11:21 am

I am repitching yeast for the first time today.

I am using JZ's mrmalty calculator at the default rates for yeast slurry.

http://www.mrmalty.com/calc/calc.html

Looks like I need to pitch about 100ml of my slurry that finished fermenting about a week ago.

I have poured off most of the wort on top as it has sat in the refrigerator, and will let it get to room temp before mixing the rest up and pouring out a measured about of the slurry and pitching it in my wort that I made last night and is now a couple degrees below my target ferment temperature. I think the yeast in the middle is supposed to be the best (some crap sinks and other stuff floats) but don't know the best way of getting it - maybe it will be easier to separate and pour some off the top as it comes to room temp?
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