Author Topic: Repitch slurry or new starter  (Read 1909 times)

Leann ull

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Re: Repitch slurry or new starter
« Reply #15 on: January 14, 2017, 02:17:18 PM »
Have a sip of the beer you pour off as well

DEMPSEY

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Re: Repitch slurry or new starter
« Reply #16 on: January 14, 2017, 04:07:05 PM »
Your new beer is 24 plato and your volume is 12.5 liters. To assume that your slurry is healthy it will have 0.8 to 2 billion cells per millilitres. Let's err and assume 1 billion cells. For ale a standard recommended amount of cells is 0.75 million per millilitres per  degree plato. The calculation is,
 pitching rate x millilitre of wort x degree plato of wort =cells needed.
that's 750,000 X 12,500 X 24 = 225,000,000,000.
225 billion cells. So if we assumed you have 1 billion cells per millilitre in your slurry then you need 225 millilitres of slurry.
Dei miscendarum discipulus
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BrewDorg

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Re: Repitch slurry or new starter
« Reply #17 on: January 14, 2017, 04:13:04 PM »
Thought I'd smash the target but got a stuck mash so ended up missing it :(

1.095 OG so pitched all the slurry I had into it. Didn't taste the beer on top. Since I topped it up with 500ml water to begin with, I don't know if tasting that would have helped. The decanted slurry smelled fine though, mainly hops actually.

Leann ull

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Re: Repitch slurry or new starter
« Reply #18 on: January 14, 2017, 07:48:08 PM »
Stuck mash or sparge?, oat husks or a stir normally sorts that oak especially in bigger beers because of the weight of the grain

BrewDorg

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Re: Repitch slurry or new starter
« Reply #19 on: January 14, 2017, 08:02:48 PM »
Stuck mash. The overflow pipe is about 8cm from the grain bed and was being constantly used through the last part of the mash. I actually did a reiterated mash, the first part gravity  being spot on, the second part being 6 points low. I had rice hulls and all, just didn't bloody use them!

Leann ull

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Re: Repitch slurry or new starter
« Reply #20 on: January 14, 2017, 08:11:20 PM »
Ouch!

BrewDorg

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Re: Repitch slurry or new starter
« Reply #21 on: January 14, 2017, 08:53:30 PM »
I'll know in future. Rice hulls and mix the shite out of the mash a couple of times. Added some DME to hit my target so hopefully I'll still have my 10% stout next Christmas.

Leann ull

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Re: Repitch slurry or new starter
« Reply #22 on: January 14, 2017, 09:11:16 PM »
I know with oat you have to rinse not sure about the rice, might be no harm ?

BrewDorg

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Re: Repitch slurry or new starter
« Reply #23 on: January 16, 2017, 10:47:58 AM »
Must rinse oat hulls is it?

The stout was off and running before I went to bed Saturday.

Leann ull

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Repitch slurry or new starter
« Reply #24 on: January 16, 2017, 11:28:12 AM »
Yep, I chuck em in a bucket and pour through colander, easy to handle wet
« Last Edit: January 16, 2017, 12:50:09 PM by CH »

BrewDorg

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Re: Repitch slurry or new starter
« Reply #25 on: January 16, 2017, 12:34:31 PM »
Good to know, cheers. I suppose that's why they tend to float so, because I usually don't soak them?