5l Demijohns For Yeast Starters

[mbd1979]

G'day all,

Just in relation to yeast starters, i normally get 'em going in a 500ml glass science flask (i forget their name now, been too long since uni chemistry) then step up to a 2L coke bottle. I'm thinking of getting a 5L glass demijohn to make a permanent replacement of coke bottles. Just wondering if this would be too big for my starter stepping up from say 500ml to 1.5L? Too much head space?

cheers,

Matt :beerbang:

 

[razz]

G'day mbd1979, what's important for good yeast production is to step up each starter by a factor of 10. If you have approx 250 ml of yeast sediment then pitch it into 10 times its volume of new wort, say2.5 lts

 

[Archie]

G'day mbd1979, what's important for good yeast production is to step up each starter by a factor of 10. If you have approx 250 ml of yeast sediment then pitch it into 10 times its volume of new wort, say2.5 lts

Hey Matt,
I use 5lt glass demijons for yeast starters with a stir plate and have had no dramas. I did step it up though just like it has been noted in the above post. I have so much yeast now i dont know what to do with it all haha

Great to store it

http://www.aussiehomebrewer.com/forum/inde...ost&id=8484

 

[Chris]

Hi Matt,

I use a 2lt sherry flagon and a 5lt demijohn with bungs and airlocks, if im doing a lager or high gravity then I just step up to the 5 lt. I also half fill these so when I run the airstone in them they dont foam out.

Cheers

 

[mbd1979]

G'day mbd1979, what's important for good yeast production is to step up each starter by a factor of 10. If you have approx 250 ml of yeast sediment then pitch it into 10 times its volume of new wort, say2.5 lts

hey razz, thanks for the tip, it's handy to know.

what i'm still not 100% on is whether i can jump from a 500ml flask to a 5L demijohn (keeping the factor of 10) until i have the required amount of starter. To save in washing / sanitising etc and to minimise transfer between vessels, i'd like to think i can, for example, keep topping up the wort until i have a 1.5L starter in a 5L demijohn without headspace being an issue...

cheers

 

[Chris]

uh.. 10 times 500ml is 5 litres...

edit

head space shouldnt be an issue in a yeast starter

 

[mbd1979]

uh.. 10 times 500ml is 5 litres...

edit

head space shouldnt be an issue in a yeast starter

oops, should have chosen better figures! wasn't thinking... head space not an issue, thanks for clearing that up.

 

[warrenlw63]

Been using 5 litre demijohns for years now. (I pitch to 40 litres). They're great. :beerbang:

Warren -