KaSaBiS
Well-Known Member
Concerning the ratio of a step starter, reading Jamils page makes me feel like I have the wrong approach.
Using his calculator I have been pluging in the values of OG and volume of 5.5 gallons, viability from date, stir plate, and ale yeast and bump up the growth factor until it says one vial needed. I then take the volume needed at this step and make that my first volume required of starter. I take the calculated number of cells in billions, plug that into the viability, change my volume to 11 gallons and get a 2nd volume of wort needed.
Working with white labs vials and ales, I generally make a 1.5 L starter, chill approximately a day later, decant 2 days after that, make 2 L starter and let that ride until I pitch (usually one day).
He state that "Five to ten times the size of the prior step is considered correct.". He also discuss on the BN that brewers should be using a 2 L starter per 5 gallon batch without steps for a typical ale.
I am ready to purchase another flask and now have two stir plates, and want to know how to bring my process back on track. Am I getting much smaller growth than anticipated by misusing his calculator? (i.e. lower growth factor of yeast per volume on the 2nd step). Do I really need to go from 2 L starter to 5x amount? if so is he referring to liquid or Bill cells? asuming growth is logarithmic and not linear, would going from a 2 L to a 4 L be less than double the growth due to smaller ratio not encouraging as much growth?
I am prepping up for my first lager, helles munich from his great classic styles book, and with such a clean beer, am having trouble finding the answers in my prepperatory research of avoiding stressing the yeast.
Using his calculator I have been pluging in the values of OG and volume of 5.5 gallons, viability from date, stir plate, and ale yeast and bump up the growth factor until it says one vial needed. I then take the volume needed at this step and make that my first volume required of starter. I take the calculated number of cells in billions, plug that into the viability, change my volume to 11 gallons and get a 2nd volume of wort needed.
Working with white labs vials and ales, I generally make a 1.5 L starter, chill approximately a day later, decant 2 days after that, make 2 L starter and let that ride until I pitch (usually one day).
He state that "Five to ten times the size of the prior step is considered correct.". He also discuss on the BN that brewers should be using a 2 L starter per 5 gallon batch without steps for a typical ale.
I am ready to purchase another flask and now have two stir plates, and want to know how to bring my process back on track. Am I getting much smaller growth than anticipated by misusing his calculator? (i.e. lower growth factor of yeast per volume on the 2nd step). Do I really need to go from 2 L starter to 5x amount? if so is he referring to liquid or Bill cells? asuming growth is logarithmic and not linear, would going from a 2 L to a 4 L be less than double the growth due to smaller ratio not encouraging as much growth?
I am prepping up for my first lager, helles munich from his great classic styles book, and with such a clean beer, am having trouble finding the answers in my prepperatory research of avoiding stressing the yeast.
