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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Low efficiency, but it just doesn't make sense!
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Old 07-24-2010, 11:15 PM   #1
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Default Low efficiency, but it just doesn't make sense!

10.25 lbs of 2 row, 1 lb crystal 60.

Mashed spot-on at 152 for 1 hour, got first runnings, did a two step batch (with 5 minute soak) sparge with 190 degree sparge water, which raised grain bed temp to 166-167 degrees both times.

Boiled down from 6 gallons to 5, hoped for 1.059 and I got 1.050.

What happened? This just does not make sense, since I've gotten better efficiency in the past with less perfect temps.

I was so happy that I thought I finally figured this whole all grain thing out, then I was so dissapointed when I was almost a whole point off.

BTW, I stir the crap out of my grain, so dough balls are not a possible culprit.


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Old 07-24-2010, 11:27 PM   #2
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how are you crushing?


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Old 07-24-2010, 11:55 PM   #3
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When you add the sparge water, do you stir?
That makes a great deal of difference

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Old 07-25-2010, 12:04 AM   #4
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I'm using the pre-milled option from Austin Home Brew, and yes, I'm stirring!
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Old 07-25-2010, 12:54 AM   #5
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Default Hydrometer Calibration

It wouldn't hurt to test your hydrometer in some distilled water @ 60-F and see what it reads. Mine started to really slip over the years... at the end, I had to add 0.020 to the readings to get it accurate.

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Old 07-25-2010, 01:54 AM   #6
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How fast are you sparging? I got a big efficiency bump (about 5%) by really taking my time and letting the sparge go very slowly instead of just cranking open the valve. Patience with the sparge is a necessity imo.
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Old 07-25-2010, 01:55 AM   #7
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Batch sparging with valve open 100%... will try that hydrometer calibration
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Old 07-25-2010, 01:57 AM   #8
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Id try batch sparging with the valve open 20%, it will take more time but your efficiency should improve a few points.
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Old 07-25-2010, 02:01 AM   #9
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Most batch spargers go as fast as possible - throttling it back should really have no effect if you are doing it correctly.
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Old 07-25-2010, 02:17 AM   #10
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I'd agree with double checking the hydrometer. I tossed one away that was off by almost an entire point.


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