Mangrove Jack's M84

Share your experiences of using brewing yeast.
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Mashman
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Mangrove Jack's M84

Post by Mashman » Wed Jun 15, 2022 10:34 am

I usually brew bitters, pale ales and stouts. Brewing a bit of a user upper pilsner today 100% pilsner malt. Using a sachet of the above yeast. Will ferment at 12-13 degrees. Does anybody with experience of this yeast know how long it will take to ferment out?

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aamcle
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Re: Mangrove Jack's M84

Post by aamcle » Wed Jun 15, 2022 3:16 pm

If your doing 23l it's going to take time it's half the amount of yeast recommended.

With the full amount of yeast I'd suggest giving it a week at 12 then raising the temp 1 a day to 18 then when finished crash to -1 for as long as you can.

Pitch to crash could be as little as 14 days but longer if there isn't a lot of yeast.

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Mashman
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Re: Mangrove Jack's M84

Post by Mashman » Wed Jun 15, 2022 3:59 pm

Thanks for that, I have another sachet, maybe I'll add that.
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Re: Mangrove Jack's M84

Post by MashBag » Wed Jun 15, 2022 4:42 pm

Is 10g not enough then? Can you explain?

aamcle
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Re: Mangrove Jack's M84

Post by aamcle » Wed Jun 15, 2022 6:05 pm

Lager usually takes twice the a mount of yeast that a bitter of similar OG.

See - https://www.mrmalty.com/

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Mashman
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Re: Mangrove Jack's M84

Post by Mashman » Wed Jun 15, 2022 7:11 pm

Ah, mrmalty, not looked there for a while.
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spook100
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Re: Mangrove Jack's M84

Post by spook100 » Thu Jun 16, 2022 9:24 am

I recently made a Bohemian Pilsner using this yeast and it fermented down to FG in 6 days at 12C, plus 3 extra days at 15C for diacytel rest. I used two packets of yeast for a 23 litre batch. Boil some water and add to a sterilised container the night before and allow to cool overnight. At the start of your brew session, add the yeast to the container. After a couple of hours it will become quite active even in water and start frothing. Pitch it into the cooled wort and you should see active fermentation within 4-6 hours. I was very impressed with this yeast - quick to get going and very active fermentation at 12C.
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