Yeah,sometimes temp swings for instance can cause it ti stall out. Gently swirl the ermenter to stir up some yeast & warm the fermenter up a little. It can take a day to get going again if it does at all. I try to get it as close to expected FG as possible in this instance.
It'd be off a little,but 1.020 is still alittle high for an average gravity brew.
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