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Old 01-05-2010, 09:33 PM   #1
smashed4
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Default Best size flask for stir-plates

What kind of flask do you use for your stir-plate?

1000 ml and 2000 ml Erlenmeyer flasks seems to be the norm. What size should I get?

I usually do 700-800ml starters for a 6 gallon batch. A 1000ml would leave little head space for this size of starter, but I figure since it is on a stir-plate, I could reduce the size of the starter to 500ml or less easily?

Also, if you use something else than an erlenmeyer, please share..


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Old 01-05-2010, 10:05 PM   #2
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Get a 2000 ml flask. This way you can do larger starters which are needed for lagers.


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Old 01-05-2010, 10:09 PM   #3
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2000 ML would be my vote. 700-800 is not big enough most beers. I have a 1000, 2000, 4000 and a 5000ml I use the 2000 the most except for lagers.
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Old 01-05-2010, 10:09 PM   #4
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My first starter was a 1000ml. Switched to a 2000ml right away.
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Old 01-06-2010, 07:15 AM   #5
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I have a 1000, 2000 and a 5000. Never used the 1000. 2000 for ales and 5000 for lagers.
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Old 01-06-2010, 07:18 AM   #6
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500 is way too tiny.. good for slurry storage. 2000 is a good size.
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Old 01-06-2010, 07:48 AM   #7
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I've been doing starters for about 5 batches. 1000ml seems to work fine for me so far.
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Old 01-06-2010, 07:53 AM   #8
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I have been using a 1L flask for a while now and it's been fine, but I also haven't brewed anything high gravity in a long time. I recently looked into making a starter for my planned RIS, and realized that my 1L flask just wasn't big enough. I went ahead and bought a 2L flask when I got the ingredients.


So, I agree with others who say 2000ml. It's a good size for most anything you'd want to brew at that batch size, except for maybe when you get into the big lagers.
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Old 01-06-2010, 01:43 PM   #9
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Once you factor in yeast viability then often a 2L flask (on a stirplate) is just barely big enough for 5 gal batch of medium gravity ale. I'm making a starter tonight using a smack pack made on 10/12/09 and I'll need to make a 2L starter just to properly pitch a 1.051 OG ale. IMO, 2L should be the smallest size considered.
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Old 01-06-2010, 08:05 PM   #10
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Since I can't use an Erlenmeyer flask to boil the wort (due to my electric stove top), I've gone ghetto on my starter flasks.

I've used a thoroughly sanitized glass flower vase as a 1L flask.



I also use a large 2L glass pitcher (normally used to make lemonade during the summer). The nice thing about my 2L pitcher is that it has a nice lip which prevents the magnet bar from falling into the fermenter.

Both work fine on my homemade stir plate.


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