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Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Double Pitch?
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Old 11-11-2009, 04:42 AM   #1
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Default Double Pitch?

AHB suggests double pitching for high gravity beers. Is this necessary assuming a starter is used?

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Old 11-11-2009, 04:59 AM   #2
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I think they are suggesting you double pitch if not using a starter. Now...This depends on how big of a starter you are using...

Use this for reference
http://www.mrmalty.com/calc/calc.html

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Old 11-11-2009, 05:03 AM   #3
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Ok, let me restate the question:

What beers would require a double pitch w/starter?

I like big beers and am looking at possibly a Belgian Trippel or Imperial IPA at some point.

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Old 11-11-2009, 05:08 AM   #4
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Quote:
Originally Posted by triangulum33 View Post
Ok, let me restate the question:

What beers would require a double pitch w/starter?

I like big beers and am looking at possibly a Belgian Trippel or Imperial IPA at some point.
LOL. None of them require it if you have time to step your starter up. How bout we try it this way, how big a beer do you want to brew, and how many days ahead of brew day can you start a starter?

You can use the Mr Malty pitching calculator to show you how much starter you should need based on the anticipated OG, and method of stirring the starter. Any recommendation that is going much beyond 2000ml you should should ideally consider stepping up in multiple steps rather than doing all at once. Not absolutely necessary, but the bigger you go in a single step, the more stress you put on the yeast.

http://www.mrmalty.com/calc/calc.html
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Old 11-11-2009, 05:19 AM   #5
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Thanks.
AHB's Belgian Trappist Ale Trippel lists the OG at 1.082. Mr Malty calls for 2 packs and ~2L of starter.
I can do that. I dont mind making 2 starters.

Do they get pitched at the same time, or pitch the second later?

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Old 11-11-2009, 05:29 AM   #6
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Quote:
Originally Posted by triangulum33 View Post
Thanks.
AHB's Belgian Trappist Ale Trippel lists the OG at 1.082. Mr Malty calls for 2 packs and ~2L of starter.
I see yours with 1L of starter and 2 packs of yeast OR a 1.82L of starter with 1 pack of yeast (adjusting the growth factor). I like less yeast packets because I like to get all the money I can out of the yeast (it's the cost factor I can really control).

Now what Zen is talking about is starting say with a 1L starter and 1 pack and then adding another 1L of wort to step up your starter and producing less stress on your yeast, which is probably the smarter way to do it.
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Old 11-11-2009, 05:38 AM   #7
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For the Noobs: AHB means Austin Homebrew Supply or www.austinhomebrew.com

We suggest double pitching on beers over 1.060 original gravity. You can also make a starter but it is very popular to buy 2 vials instead of making a starter.

Forrest

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Old 11-11-2009, 05:44 AM   #8
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So Forrest,
Instead of making a starter, one could just dump 2 yeast vials directly into the fermenter? I thought liquid yeast almost always should have a starter.

Thanks for the advice and please forgive my ignorance. My 2 semesters of biology doesnt seem to be helping me here.

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Old 11-11-2009, 05:45 AM   #9
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Quote:
Originally Posted by triangulum33 View Post
Thanks.
AHB's Belgian Trappist Ale Trippel lists the OG at 1.082. Mr Malty calls for 2 packs and ~2L of starter.
I can do that. I dont mind making 2 starters.

Do they get pitched at the same time, or pitch the second later?
There is a drop down menu in the middle top of the calculator. I think you left it on simple starter to come up with 2 packs and 2 liter starter each. Do you have a stir plate? If not even intermittent shaking, which is shaking or swirling your starter will cut your starter size down.

Next question is how big a vessel or flask do you have to make starter in.
1.8L is pushing it a bit for a 2000ml flask. It doesn't leave much room in case a krausen comes up. If you have a larger than 2000ml flask, or other vessel I would still try to do only one starter at 1800ml. If not you will have to step up from a smaller starter or pitch the two vials if you really aren't that concerned about buying two vials of yeast.

Yes, you should ideally pitch both starters at the same time, as one of the things the yeast do when the hit the wort is assess how much food appears to be about, and then start reproducing to get their numbers up to the task. So more yeast in all at once, means more yeast at the start, less lag time reproducing, and sooner to work for the yeast.
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Old 11-11-2009, 05:51 AM   #10
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Hey, thanks Zen. That clears it up a lot. That's pretty interesting how the yeast behave.

I only have a 1000mL flask.

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