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Old 12-25-2013, 04:53 PM   #11
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Originally Posted by EarlyAmateurZymurgist View Post
I am taking a stab in the dark here, but are you on a public water supply? I used to have this kind of thing happen when I lived in a house with a public water supply. The county in which I lived would occasionally switch from drawing water from artesian wells to purchasing surface water from a neighboring county. The surface water supply had a radically different chemistry.

Good suggestion. However, I am on a well. Haven't tested water since I moved in back in 2005. I suppose it could have changed. Not sure.

Thanks.
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Old 12-25-2013, 06:22 PM   #12
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Your ph possibly, different grains will affect the ph and not really knowing your water profile is not knowing your main ingredient, see if you can test your water again, even city water profiles change all the time due to water consumption, peak season ( summer ) and off seasons (winter) and input it into http://www.brewersfriend.com/mash-ch...er-calculator/ along with your grist info, hope this helps

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Old 12-25-2013, 06:50 PM   #13
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You go to great lengths to measure temperature, which you yourself admit has little influence on efficiency. However, you don't measure your volumes, which has a much larger impact on efficiency. It just doesn't make any sense.
You're not making any sense. The OP stated multiple times including in the initial post that he/she is measuring and tracking volumes including final volume in the fermenter and nothing has changed.

Quite the puzzle, that is a pretty huge efficiency drop for someone with so much experience on their system. I'll have to go with the last few suggestions to check the water report/pH. I would think it would have to be a pretty significant change to result in such a drop, though. Not sure if you've read any of Kai's articles on his braukaiser site or if that would help at all. This one on troubleshooting efficiency talks about narrowing it down to conversion efficiency or lautering efficiency, maybe something to consider next.
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Old 12-26-2013, 07:56 PM   #14
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Default Two Low Efficiency Batches in a Row ??

Thanks for the replies, folks. I agree that this is puzzling. I've been so consistent for so long and then two low efficiency batches in a row is really a head scratcher. I'm brewing again on Sat and will really keep an eye on what is going on in my batch, including checking conversion efficiency after the mash and double checking my temps and volumes. I will re-check the pH of my water as well. Next step would be water test.

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