I might be alone on this, but after repeatedly testing it, I have found that 1 second is too long in secondary. My opinion is that it's completely a waste of time and space, and leads to potentially exposing the beer to oxygen as well as airborne bacteria/wild yeast that could result in off-flavors. Dry hop in the primary after the main fermentation is done, under good temperature conditions the yeast will continue to take care of diacetyl lowering the levels to near zero over a 30 day period.
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