Spike Brewing 12.5 Conical Fermenter Giveaway!

Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Dry Yeast Questions???

Reply
 
LinkBack Thread Tools
Old 02-01-2013, 04:25 PM   #1
BrewIt
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2010
Location: Chicago, Illinois
Posts: 55
Liked 2 Times on 2 Posts

Default Dry Yeast Questions???

Im going to be brewing a full grain wheat ale. Im going to use Safale US-05. My first question is do I have to rehydrate the yeast or just pitch it dry. I know you could do both, but not sure what way is better. It seems people on here do both. If I do need to rehydrate how much water do I use for a packet of yeast? Also Im using BeerSmith to help me along the way. I know I need 42.8 billion yeast cells. I was wondering how to tell how many are in a packet? Basically do I need 1 or 2 packets? Want to make sure Im covering all the bases and this was the final one I had questions about. Thanks in advance to anyone who responds and helps.

Dave

__________________
BrewIt is offline
 
Reply With Quote Quick reply to this message
Old 02-01-2013, 04:32 PM   #2
WoodlandBrew
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
WoodlandBrew's Avatar
Recipes 
 
Join Date: Oct 2012
Location: Malden, MA
Posts: 1,750
Liked 123 Times on 120 Posts
Likes Given: 57

Default

Recently I counted a package of US-05 and there were 150 billion viable cells. I have found that the number of viable cells is dependant on how you re hydrate. I would recommend that after aerating your wort in an ale pail, sprinkle the yeast across the surface and seal it up and let it do its thing. You don't want to mix the yeast into the wort or water when hydrating.

Here are the results:
http://woodlandbrew.blogspot.com/2013/01/how-many-cells-are-in-package.html
(note that the package of US-05 in this post was not hydrated correctly)

More extensive details coming February 9th.

Also, how big is the batch? 40 billion cells isn't many.

__________________

The 2nd edition is now available: Brewing Engineering
BLOG: Brewing Boiled Down Brewing science for those of us without a Ph.D

WoodlandBrew is offline
 
Reply With Quote Quick reply to this message
Old 02-01-2013, 04:36 PM   #3
Revvy
Post Hoc Ergo Propter Hoc
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Revvy's Avatar
Recipes 
 
Join Date: Dec 2007
Location: "Detroitish" Michigan
Posts: 40,804
Liked 2727 Times on 1635 Posts
Likes Given: 3485

Default

To hydrate or not is one of those questions that get's asked all the time, and there's a ton of opinions on both sides of the argument, and ultimately you'll just have to decide for yourself. Because there really is no right or agreed upon way.

Here's one of the hundreds of discussions on the topic

__________________

Like my snazzy new avatar? Get Sons of Zymurgy swag, here, and brew with the best.

Revvy's one of the cool reverends. He has a Harley and a t-shirt that says on the back "If you can read this, the bitch was Raptured. - Madman

I gotta tell ya, just between us girls, that Revvy is HOT. Very tall, gorgeous grey hair and a terrific smile. He's very good looking in person, with a charismatic personality... he drives like a ****ing maniac! - YooperBrew

Revvy is offline
NordeastBrewer77 Likes This 
Reply With Quote Quick reply to this message
Old 02-01-2013, 04:38 PM   #4
RIC0
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
RIC0's Avatar
Recipes 
 
Join Date: Oct 2012
Location: On my Wifes $hitlist in Indiana
Posts: 498
Liked 37 Times on 35 Posts
Likes Given: 17

Default

Quote:
Originally Posted by WoodlandBrew View Post
I counted a package of US-05 recently and there were 150 billion. I have found that the number of viable cells is dependant on how you re hydrate. i would recommend that after aerating your wort akin an ale pail sprinkle the yeast across the surface and seal it up and let it do its thing.
Here are the results:
http://woodlandbrew.blogspot.com/2013/01/how-many-cells-are-in-package.html

More extensive details coming February 9th.
I like reading your stuff woodland many thanks for your research.

So you dont think rehydrating at the temp recommended and then pitching once that temp has come down to within 10 deg of the wort is necessary?? That is how i usually pitch dry yeast and it works great and fast.
__________________

*** Possum Trot Brewery ***

Beer Primary - Butthead Belgian
Beer Secondary - Belgian Tripel

Bottled - Big Breakfast Stout - Belgian IPA - Butthead Belgian White - Redneck Red - Moose Drool - Dirty Dubbel

Mead Primary - Nuttin
Bottled - Strawberry Trainwreck - Orange Spice - Blueberry Trainwreck

RIC0 is offline
 
Reply With Quote Quick reply to this message
Old 02-01-2013, 04:54 PM   #5
WoodlandBrew
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
WoodlandBrew's Avatar
Recipes 
 
Join Date: Oct 2012
Location: Malden, MA
Posts: 1,750
Liked 123 Times on 120 Posts
Likes Given: 57

Default

Quote:
Originally Posted by RIC0 View Post
I like reading your stuff woodland many thanks for your research.

So you dont think rehydrating at the temp recommended and then pitching once that temp has come down to within 10 deg of the wort is necessary?? That is how i usually pitch dry yeast and it works great and fast.
What you are doing sounds like a great way to do it. It is very kind to the yeast for a number of reasons. It's certainly good, but I don't know if I would say nessisary.
__________________

The 2nd edition is now available: Brewing Engineering
BLOG: Brewing Boiled Down Brewing science for those of us without a Ph.D

WoodlandBrew is offline
 
Reply With Quote Quick reply to this message
Old 02-01-2013, 05:46 PM   #6
BrewIt
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2010
Location: Chicago, Illinois
Posts: 55
Liked 2 Times on 2 Posts

Default

Quote:
Originally Posted by WoodlandBrew View Post
Recently I counted a package of US-05 and there were 150 billion viable cells. I have found that the number of viable cells is dependant on how you re hydrate. I would recommend that after aerating your wort in an ale pail, sprinkle the yeast across the surface and seal it up and let it do its thing. You don't want to mix the yeast into the wort or water when hydrating.

Here are the results:
http://woodlandbrew.blogspot.com/2013/01/how-many-cells-are-in-package.html
(note that the package of US-05 in this post was not hydrated correctly)

More extensive details coming February 9th.

Also, how big is the batch? 40 billion cells isn't many.
Its a 5 gallon batch. Not sure why its so little, but that is what BeerSmith is telling me. This is the recipe Im using: http://www.brew365.com/beer_three_floyds_gumballhead.php
__________________
BrewIt is offline
 
Reply With Quote Quick reply to this message
Old 02-01-2013, 06:00 PM   #7
BrewIt
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2010
Location: Chicago, Illinois
Posts: 55
Liked 2 Times on 2 Posts

Default

Is it possible to put in too much yeast, or will the extra just die off? Would it be wise to put in 2 packets just to be safe?

__________________
BrewIt is offline
 
Reply With Quote Quick reply to this message
Old 02-01-2013, 06:15 PM   #8
stpug
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2012
Posts: 2,287
Liked 314 Times on 274 Posts
Likes Given: 146

Default

You should be close to 200 billion needed. IMO, 1 packet of US05 should be sufficient - sprinkled or rehydrated (I prefer rehydrated according to package instructions, but that's just me).

__________________
stpug is offline
 
Reply With Quote Quick reply to this message
Old 02-01-2013, 06:45 PM   #9
jflongo
HBT_SUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2013
Posts: 1,230
Liked 64 Times on 57 Posts
Likes Given: 5

Default

I have ALWAYS just sprinkled the dry yeast on top. However, this last batch, i decided to re-hydrate it for kicks, and "to me" the fermentation seemed to kick off a little faster. Could be my imagination though

__________________
jflongo is offline
 
Reply With Quote Quick reply to this message
Old 02-01-2013, 06:56 PM   #10
BrewIt
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2010
Location: Chicago, Illinois
Posts: 55
Liked 2 Times on 2 Posts

Default

Quote:
Originally Posted by stpug View Post
You should be close to 200 billion needed. IMO, 1 packet of US05 should be sufficient - sprinkled or rehydrated (I prefer rehydrated according to package instructions, but that's just me).
How much water do you use when you rehydrate 1 packet?
__________________
BrewIt is offline
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Yeast questions MrSmug Beginners Beer Brewing Forum 7 03-06-2012 07:51 PM
Two yeast questions sauerj67 Fermentation & Yeast 2 03-26-2011 03:30 PM
Croping yeast and washing yeast questions brewguy82 Fermentation & Yeast 3 02-21-2011 09:39 AM
Yeast Slanting Questions - Expired Yeast and Cider DKershner Fermentation & Yeast 5 01-18-2010 04:09 PM
Re-yeast questions cee3 Bottling/Kegging 2 07-02-2008 05:35 PM