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Old 05-16-2010, 09:49 PM   #1
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Default Outdoor AG in brewing in coolers

SO, I tried AG for the first time. Everything went well; good efficiency, temps, the whole bit, but the flavor seems off - bitter. I used a converted partial mash recipe I have done before, so I feel I have a decent comparison.
Why the off flavors? Could it be the plastic coolers? Because I used water from the garden hose? Something in the mashing process? Or a combo effect?

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Old 05-17-2010, 01:57 AM   #2
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probably need a little more on the recipe and process to get an idea where it couldve come from.

I doubt its from the plastic cooler or garden hose. I have always used a plastic cooler and water from the hose. I would say the majority of people on here probably use cooler mash tuns with great success.

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Old 05-17-2010, 02:21 AM   #3
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well i guess it could be a cooler issue: what kind of cooler did you use? since it was a PM was it a food grade plastic (the 5g and larger rubbermaid/igloos are food grade hdpe). did you sparge super hot ie; over 200 degrees f?. if your answers are yes and no then it's not the cooler. it also could be from the grains if you sparged hot or got grain husks into the boil.

astringent is a discriptor of beer that is sometimes mixed with bitterness. it is usually caused by an overly hot sparge, grain bed gets over 180(f) or by having husk material in the boil itself(you need quite a bit for it to happen this way).

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Old 05-17-2010, 02:52 AM   #4
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Astrigent is exactly what it was -like tannin

here's the recipe if that helps:
11# maris otter
.5# victory rst
.25# 10L crystal
.25# flaked

1oz chinook 60 min
1oz summit 30 min
1oz cascade 10 min
1oz cascade dry hop

I did get a pretty clean sparge - doesn't seem like there was a lot of grain/husk in the boil, but maybe there was.

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Old 05-17-2010, 02:58 AM   #5
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Did you Vorlauf? and how much?

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Old 05-17-2010, 03:03 AM   #6
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I did vorlauf, maybe 2 qts - I did have good clarity going into the kettle.

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Old 05-18-2010, 02:23 AM   #7
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Astringent taste might be from sparging with a grain bed temp over 185F. Or maybe you sparged to much. You might want to stop before you runnings go below 1.010.

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Old 05-18-2010, 03:45 AM   #8
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ahh, I did take quite a bit of the sparge. Next batch I'll check the gravity. Thanks.

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Old 05-18-2010, 07:49 AM   #9
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While the tannin extraction could have come from excessive sparging or high sparging temps, it just as easily could be from the mash Ph being too high. I'd actually guess that's the case with such a low SRM recipe. What does your water chemistry look like, and is it suited for such a light beer? If you have somewhat hard water and want to brew light beers, you might consider diluting your brewing water with some distilled water, or boiling it the night before to let some bicarbonates drop out.

If you haven't already, I suggest reading this chapter prior to your next AG batch-http://www.howtobrew.com/section3/chapter15.html

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Old 05-18-2010, 12:07 PM   #10
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Quote:
Originally Posted by JuanMoore View Post
While the tannin extraction could have come from excessive sparging or high sparging temps, it just as easily could be from the mash Ph being too high. I'd actually guess that's the case with such a low SRM recipe. What does your water chemistry look like, and is it suited for such a light beer? If you have somewhat hard water and want to brew light beers, you might consider diluting your brewing water with some distilled water, or boiling it the night before to let some bicarbonates drop out.

If you haven't already, I suggest reading this chapter prior to your next AG batch-http://www.howtobrew.com/section3/chapter15.html
That's exactly what I am thinking- water chemistry can cause that flavor. My water is great for stouts, and other dark beers. But the first time I made a kolsch, it was harsh and astringent and bitter. I finally got a water report, and fixed that problem.

It makes sense when you think about it- beer only has four ingredients, and water is 1/4 of the "recipe" with the other ingredients being malt, hops, and yeast. Water is a huge part of the AG beer.
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