Aerate the wort first,then pitch the average ale yeast at 70F or lower,like 66F. The 50 minutes would be ok if it took that long to get up to temp. But 170 is a bit high,the threshold of leaching tannins out of the grain hulls. 150-165F is more normal.
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Everything works if ya let it-Roady(meatloaf)
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