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Old 04-10-2012, 02:52 PM   #1
Scuba
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Default Stepping up from bottle harvested yeast: Confused

I have a question that I am unclear on the answer to regarding stepping up a harvest from a bottle to make a 1.5 L starter that will contain 229B cells. After looking at previous posts on harvesting I am still unclear so I humbly seek the counsel of the group.

Should I proceed like this?

1. 100ml water/10g DME and dredges from two bottles of bells two hearted.
2. decant: new 200ml water/20g DME
3. decant: new 400ml water/40g DME
4. decant: new 800ml water/40g DME
5. decant: new 1500ml water/150g DME

Or, is this the way to do it?

1. 100g water/10g DME and dredges from three bottles of two hearted.
2. Do NOT decant: add 200g water/20g DME (I now have 300ml of wort)
3. Do NOT decant: add 400g water/40g DME (I now have 700ml of wort)
4. Do NOT decant: add 800g water/40g DME (I now have 1500ml of wort)

Or, do I have it completely wrong? Thanks in advance for any help.

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Old 04-10-2012, 04:02 PM   #2
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First, I wouldn't start with 1.040 wort. I would start lower for the first couple steps. Second, I would use something other than Two Hearted if you can. Pale Ale, Amber, etc. all use the same yeast and will have significantly less-stressed yeast. Third, I don't think you'll need that many steps.

Mine went something like 25-50mL @1.020> 500 mL @ 1.030> 1.6L @ 1.040. I chilled and decanted for each step, although it can work the other way too.

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Old 04-10-2012, 04:14 PM   #3
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I've always had success using Bell's Pale ale, haven't tried culturing out of Two Hearted, but I'm sure you would get some activity, albeit the yeast will be more stressed like pabloj said. Oberon is also a good candidate for culturing, the yeast cake on the bottom of the bottles I got last week are huge.

When I culture, I usually start out with ~50-75mL of 1.040 wort, but since it gets diluted by the volume of the dregs I end up with maybe ~125-150mL of ~1.020-10.25ish wort. From there I step up to 300mL > 600mL > 1000mL, all 1.040, decanting between each step. Since I usually do this way in advance to brewing, I end up having to restart the yeast in another 1L starter the day before it's needed, so that probably helps with the cell count as well.

That's just what works for me, as long as you do at least 3 steps of reasonable sizes I'm sure you'll be fine.

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Old 04-13-2013, 12:10 PM   #4
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Bringing back this old thread because it looks like it will be helpful for my first attempt at harvesting.

How long do you guys leave each step on the stir plate? And do I need to oxygenate the wort if I use a stir plate?

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Old 04-13-2013, 12:38 PM   #5
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+1 to using Oberon for this. There's usually tons of dregs at the bottom too. Amber, Porter, Third Coast Beer (not the old ale) Pale Ale, Smitten, woudl all work well.

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Old 04-13-2013, 12:41 PM   #6
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ok....I have to ask...why dont you just use the yeast from all six?..I also was pondering harvesting from bottles, and just stumbled across this thread...Tom

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Old 04-13-2013, 12:53 PM   #7
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also....where can I find a chart that says how much dme to water...for a approx gravity starter?...I just cant see checking with my hydrometer and thief for this small amount...thankx....Tom

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Old 04-13-2013, 01:03 PM   #8
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failed at my first attempt at yeast wrangling

used dregs from 2 bottles of Bell's MW Pale, but didn't notice package date on it was November of last year. think that might have been a little too old.

I mixed up 3 tablespoons of DME into 1 pint of water. Beersmith calculated that as 1.044.

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Old 04-13-2013, 01:15 PM   #9
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Dammit people!! Your drowning out my question and the reason I brought back this thread!

Haha I'll try again.

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Old 04-13-2013, 01:16 PM   #10
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How long do you guys leave each step on the stir plate? And do I need to oxygenate the wort if I use a stir plate? First time using one.

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