scubastan
Active Member
Hi Everyone,
I have a question about stepping up yeast.
I have a un-opened vial of Whitelab 004 Irish Ale Yeast.
I plan on brewing a 5.25G Brown Ale with a Starting Gravity of 1.056
According to Mr Malty I need 205 Billions cells. I use a stirplate so it says I only need a 1L starter. I can just as easily go 2L or 3L starters.
A Whitelab vial has 35ml of liquid and ~70-120B cells.
Here is my question:
Using 70 Billion / 35ml you would get 2 Billion cells per ml of liquid.
2L is approximate 1/2 gallon. So using MrMalty Calculator. and entering
1.045 O.G. and 1/2 gallon I would need 20 Billion cells.
Does that mean if I use 10ml of yeast from the vial I will have enough yeast to ferment the starter? Then once its completely fermented on my stir plate I should have the 200 Billion cells I need for the 5gallon batch?
Sorry if this is confusing, but I hope you can follow along with what i'm trying to explain.
I know I could just use the entire vial to make my starter and be done with it. But if I only need 10ml of yeast from the vial, that means I can use that single vial for 3 different batches.
My current setup is to make larger starters then needed and then store the extra yeast for future use. But if I can use only 10ml I will save alot of valuable freezer space, and also risk less contamination.
I have a question about stepping up yeast.
I have a un-opened vial of Whitelab 004 Irish Ale Yeast.
I plan on brewing a 5.25G Brown Ale with a Starting Gravity of 1.056
According to Mr Malty I need 205 Billions cells. I use a stirplate so it says I only need a 1L starter. I can just as easily go 2L or 3L starters.
A Whitelab vial has 35ml of liquid and ~70-120B cells.
Here is my question:
Using 70 Billion / 35ml you would get 2 Billion cells per ml of liquid.
2L is approximate 1/2 gallon. So using MrMalty Calculator. and entering
1.045 O.G. and 1/2 gallon I would need 20 Billion cells.
Does that mean if I use 10ml of yeast from the vial I will have enough yeast to ferment the starter? Then once its completely fermented on my stir plate I should have the 200 Billion cells I need for the 5gallon batch?
Sorry if this is confusing, but I hope you can follow along with what i'm trying to explain.
I know I could just use the entire vial to make my starter and be done with it. But if I only need 10ml of yeast from the vial, that means I can use that single vial for 3 different batches.
My current setup is to make larger starters then needed and then store the extra yeast for future use. But if I can use only 10ml I will save alot of valuable freezer space, and also risk less contamination.