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Old 03-15-2010, 04:36 PM   #1
tintmaster88
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Default low attenuation on first two all grain attempts

I brewed a fat tire clone recipe that I got from byo 3 weeks ago. I mashed at 155 and got 83% efficiency. I made a 2l starter with wlp060 the night before. The next day it wasnt doing anything so I checked the slant and saw it was expired by a month. So I went and picked up wlp001 and added it to the starter. I brewed the beer and added the starter which wasnt at high kraussen but was showing signs of activity. Pitched yeast at 60 and raised up to 65. The temp did vary between 60 and 68 for a couple of days before I finally got it to settle around 65. 2 weeks later it was at 1.022 and showed no signs of activity. I swirled and raised the temp to 72. Another week and still at 1.022. Beersmith says my attenuation is at 58%. What can I do and what was the likely cause of this? I wouldn't have worried too much but I brewed a batch of apa a week ago and it seems to be stopped at 1.021 also. I didn't make a starter but I pitched 2 vials of wlp001. Should I start mashing at a lower temp? What's the problem here?

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Old 03-15-2010, 04:45 PM   #2
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How much crystal malt was in the recipe? 155 is at the high end of the range and will lead to less attentuative worts. At this point you can drink it, it will taste fine. I'd stop fooling around with it, you are just going to introduce oxygen and other nasty things.

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Old 03-15-2010, 04:51 PM   #3
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your first batch of wlp060 was fine. just because its past the expiration date doesn't meant that its useless. it just needs a starter. possibly a larger starter. next time go to Mr. Malty and enter the appropriate dates and see with it says.

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Old 03-15-2010, 05:03 PM   #4
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The fat tire clone used .5 crystal 20 and .5 crystal 40. I went to mr malty and it said 5% viability I think.

So you wouldn't try to make another large starter. You think all the fermentables are gone because of the mash temp. 155 is what the recipe called for. The second beer was jamil's apa and called for 154 mash temp. I hit both of those right on.

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Old 03-15-2010, 09:26 PM   #5
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Beersmith says my attenuation in 58%. That's way low. I don't know if i want to bottle that. I really don't want to bottle the apa like that. It needs to be a little dryer for sure.

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Old 03-15-2010, 10:21 PM   #6
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Check your thermometer in icewater and boiling to see if it's off. If it reads 3-4F too low, you were mashing too hot.

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Old 03-16-2010, 12:35 AM   #7
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You nailed that one. I have 2 thermometers both were reading 10 degrees low. I actually mashed at 165. So, now what? I can brew another batch mashed really low so it's nice and dry and mix it with the other one to meet in the middle. Anybody used enzymes to break down the unfermentables?

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