Author Topic: 1 L Erlenmeyer flask  (Read 603 times)

Offline Wilbur

  • Brewer
  • ****
  • Posts: 356
    • View Profile
1 L Erlenmeyer flask
« on: March 05, 2018, 08:50:43 PM »
I found I have an old 1 L Erlenmeyer flask (Pyrex). Any use for this in making starters? I've typically seen people talk about 2L+, so I'm a little doubtful. I don't have a stirplate, I'm planning on shaking. Any thoughts on how much headspace I'd need to leave? Thanks!

Offline klickitat jim

  • I must live here
  • **********
  • Posts: 8469
    • View Profile
Re: 1 L Erlenmeyer flask
« Reply #1 on: March 05, 2018, 08:52:09 PM »
For shaking I'd recommend a vessel about 4 times the size of the starter wort.

Offline flars

  • Assistant Brewer
  • ***
  • Posts: 145
    • View Profile
Re: 1 L Erlenmeyer flask
« Reply #2 on: March 05, 2018, 09:06:02 PM »
Your flask would work well for a 500 ml vitality starter the morning of brew day.

Offline jkirkham

  • Assistant Brewer
  • ***
  • Posts: 244
    • View Profile
Re: 1 L Erlenmeyer flask
« Reply #3 on: March 05, 2018, 09:25:09 PM »
I have had a 1l and a 2l and with my 1l I have not had an issue with head space.  1 cup of water is 235ml plus however much yeast you put it, liquid may bring you to around 500ml. Just shaking the flask periodically, in my eyes, won’t be an issue for you. Even if you used a stir plate I don’t think headspace will be an issue.

The last time I used my 1l I built up a strain over a week and did not have head space issues.
Vice President
Flagstaff Mountain-Top Mashers
2017 Homebrewer of the year

Offline IPAnic

  • Cellarman
  • **
  • Posts: 32
    • View Profile
Re: 1 L Erlenmeyer flask
« Reply #4 on: March 05, 2018, 11:50:16 PM »
My experience is that a 1L erlenmeyer flask weighs very near what a 2L erlenmeyer flask. Meaning...the 2L flask is around halve the glass thickness of a 1L and is just too fragile for me. If I'm making a "regular" strength beer I use the sturdy 1L flask (1qt to 1/2 Cup DME), but I'm making a "big beer starter" I use a 1 gallon glass jug that has solid wall thickness.

Offline reverseapachemaster

  • Official Poobah of No Life.
  • *
  • Posts: 3144
    • View Profile
    • Brain Sparging on Brewing
Re: 1 L Erlenmeyer flask
« Reply #5 on: March 06, 2018, 05:19:09 PM »
I have a one liter flask I bought. I'm not really sure why I didn't buy larger. I think at the time it was all the store had. I still use it quite a bit because I mostly brew 1-2 gallon batches so I don't need a huge starter.
Heck yeah I blog about homebrewing: Brain Sparging on Brewing

Offline ASLO

  • 1st Kit
  • *
  • Posts: 15
    • View Profile
Re: 1 L Erlenmeyer flask
« Reply #6 on: March 06, 2018, 07:04:11 PM »
For shaking I'd recommend a vessel about 4 times the size of the starter wort.

I agree. When shaking a starter, it will foam up and overflow if your vessel isn't at least 3 times the volume of your starter. I use a ~3L jug to make 1L starters and usually step up to 2L when needed.

Offline rangemaster75

  • 1st Kit
  • *
  • Posts: 1
    • View Profile
1 L Erlenmeyer flask
« Reply #7 on: March 06, 2018, 07:34:48 PM »
There was a post on MTF from a microbiologist who said surface area was the key for the best growth and health in starters. He said most peoples flasks are too small  and filled too full for proper oxygen for yeast growth. Ideally you should have no more than 800ml (less is better) in a 2L flask so a 1L is great to have around for a prop of of old yeast (maybe expired) that you have to step up. I just did one that was 200ml to start in a 2L flask and then for the second step to 2L it went in my big 5L flask. The 2L flask was a bit to big for the 200ml and the stir bar splashed a bit. The 1L would be great for that. Like I said, ideally a 1L maybe up to 400ml, 2L up to 800ml and a 5L up to max 2L


Sent from my iPhone using Tapatalk
« Last Edit: March 06, 2018, 07:41:07 PM by rangemaster75 »

Offline Robert

  • Senior Brewmaster
  • ******
  • Posts: 1654
    • View Profile
Re: 1 L Erlenmeyer flask
« Reply #8 on: March 06, 2018, 07:57:05 PM »
I have also found something <1000ml in a 2000ml flask to be the limit.  Otherwise the vortex on the stir plate will not clear a space at the bottom -- ie very insufficient aeration -- or foam will rise too high and surface area be too small if shaking.
Rob
Akron, Ohio

I'd rather have questions I can't answer than answers I can't question.

Offline Wilbur

  • Brewer
  • ****
  • Posts: 356
    • View Profile
Re: 1 L Erlenmeyer flask
« Reply #9 on: March 06, 2018, 08:24:28 PM »
Thanks, I'll keep an eye out for a larger flask. I'll probably try for 3 L to be on the safe side.

Online denny

  • Administrator
  • Retired with too much time on my hands
  • *****
  • Posts: 19445
  • Noti OR [1991.4, 287.6deg] AR
    • View Profile
    • Dennybrew
Re: 1 L Erlenmeyer flask
« Reply #10 on: March 06, 2018, 08:58:00 PM »
I use a gal. glass jug.  It only cost a few bucks and it came filled with apple juice.  I've got 4 useless flasks of different sizes sitting in the garage now.
Life begins at 60.....1.060, that is!

www.dennybrew.com

The best, sharpest, funniest, weirdest and most knowledgable minds in home brewing contribute on the AHA forum. - Alewyfe

"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts." - Bertrand Russell

Offline klickitat jim

  • I must live here
  • **********
  • Posts: 8469
    • View Profile
Re: 1 L Erlenmeyer flask
« Reply #11 on: March 06, 2018, 11:19:57 PM »
I think we're starting to talk about two different things guys. He's not using a stir plate, he said he's going to shake-aerate. Mark the SNS yeast guru originally suggested a vessel 4 times the size of the starter wort and shaking till it's all foam.

I prefer the lazy way of using O2. I use 2L flasks for about 1200-1300ml of wort. Works great.

The main idea though is that these SNS/O2 starters are not about cell count, it's about pitching active yeast to your beer. So you build your starter about 8-12 hrs before pitching to your beer.
« Last Edit: March 06, 2018, 11:21:38 PM by klickitat jim »

Offline charlie

  • Cellarman
  • **
  • Posts: 54
    • View Profile
    • Malt Munching Mash Monsters
Re: 1 L Erlenmeyer flask
« Reply #12 on: March 07, 2018, 11:47:18 PM »
The rule is that the starter should be half the volume of the flask.

My procedure calls for boosting a White Labs packet to four 500 ml stock starters which I then refrigerate. Each 500 ml stock starter will be used to make a 2 liter starter for brew day. I use 1L flasks for the 500 ml stage.

Charlie
Yes officer, I know that I smell like beer. I'm not drinking it, I'm wearing it!

Offline Adam

  • Cellarman
  • **
  • Posts: 62
    • View Profile
    • High Altitude Home Brew Supply
Re: 1 L Erlenmeyer flask
« Reply #13 on: March 13, 2018, 06:58:50 PM »
I hope this doesn't take the thread too off topic... Have you considered using a 1/2 gal mason jar?  They are thick and heat resistant. 
Fermentation at Elevation

Online denny

  • Administrator
  • Retired with too much time on my hands
  • *****
  • Posts: 19445
  • Noti OR [1991.4, 287.6deg] AR
    • View Profile
    • Dennybrew
Re: 1 L Erlenmeyer flask
« Reply #14 on: March 13, 2018, 07:28:44 PM »
The rule is that the starter should be half the volume of the flask.

My procedure calls for boosting a White Labs packet to four 500 ml stock starters which I then refrigerate. Each 500 ml stock starter will be used to make a 2 liter starter for brew day. I use 1L flasks for the 500 ml stage.

Charlie

For SNS starters, the rule is that the container should be 4x the starter size.
Life begins at 60.....1.060, that is!

www.dennybrew.com

The best, sharpest, funniest, weirdest and most knowledgable minds in home brewing contribute on the AHA forum. - Alewyfe

"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts." - Bertrand Russell