The generic American lager I made a while back is now pretty clean. It’s a little fruity, but I used Maris Otter, rather than Pils malt, so it probably wouldn't have that clean crispness anyway. The test batches too seem fairly clean, but a still a little fruity now that they have fermented out. I had these all lined up in wine glasses and couldn't really get much of anything. I'll have to try again now that they should be pretty well conditioned and I can taste it for defects.
Here's the score the best I can tell.
- Every beer that used at least the most current bag of Durst Pils malt had AE.
- Changing levels of O2 didn't seem to make any difference. From just shaking, to hitting with pure O2 until fermentation began.
- Levels of nutrients haven't seem to make much difference, although, I've yet to get results from a starter w/ no nutrients. That's coming up next.
- Starter temps seem to make no difference. I've done starters as cool as 50-degrees.
- Pitching rates don't seem to really matter.
- Fermentation temps don't seem to matter. I'm already doing it at 48, and warming it at the start and fermentation temp didn't make it stronger or go away.
- Starter Method - I've done both stir plate and simple starters.
- Yeast selection doesn't seem to matter. I've got EA with WLP 833, 830 838, and 515. Not certain on 838, but I think so. I've repeated EA with 830 and 833 tons of times.
Could this really have anything to do with my base malt? That MO lager was clean. I went back, and my last good lagers before that were last spring, an extract batch, and a CAP. I had some batches before that with EA also. Not sure I can explain that CAP. My notes say it used Durst, but I'm not 100% that I used it, or just formulated the recipe for it. It did use the cake from that extract batch, so maybe all that yeast helped. Anyway, I'm into a bag of Dingemans Pilsner malt. There's no date on the bag, but I'll assume it's fairly fresh since it was special ordered for me.
So, next up... a double batch German Pils with Belgian Pils malt. I'm also planning to do a split starter on this one, one on the stir plate, the other I'll do a 4L simple starter at 50-degrees made up from from extract. This simple starter will have no nutrients. The batch itself will also have no nutrients. This should test the malt, starter nutrients/excess nutrients, and the canned starter wort I've been using.
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