Author Topic: 2 batches ruined  (Read 3178 times)

Offline dmtaylor

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Re: 2 batches ruined
« Reply #30 on: January 27, 2012, 05:59:48 AM »
Zinc and other nutrients are NOT stripped out when extract is made.  In fact, it is the exact opposite that is true.  These nutrients are concentrated.  So if you then add water on top of it that contains more salts and impurities, you end up with perhaps twice as much as you would for all-grain brewing.

The point that I think Tom might have been trying to make is that water is always low on zinc, which has been proven important for yeast health.  So that's why some people add yeast nutrients or shave a teeny tiny bit of a zinc tablet into their raw beer to help the yeast with respect to zinc and other unidentified essential nutrients that might be important for yeast health.
Dave

"This is grain, which any fool can eat, but for which the Lord intended a more divine means of consumption. Let us give praise to our Maker, and glory to His bounty, by learning about... BEER!" - Friar Tuck (Robin Hood - Prince of Thieves)

Offline tschmidlin

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Re: 2 batches ruined
« Reply #31 on: January 27, 2012, 11:08:54 AM »
Yes, exactly Dave.  If you really want to make your yeast happy, use a yeast nutrient.  Plain water/malt doesn't have everything they need.  If you are using fresh store bought yeast every time you will probably not notice a difference, but if you are constantly repitching then it will help you have more healthy yeast in subsequent batches.
Tom Schmidlin