Was fermenting an Oyster Stout so the oyster flavor is a very subtle nuance. I was fermenting in the upper 60's and decided to reduce temps slightly and dropped 5 degrees. Before I knew what was going on, my BO tube sucked back close to two cups of star san solution into the fermenter.
Granted this is a small amount of diluted star san in a 5.5G batch of beer. But I "think" I can taste the star san in the beer...of course I am subconsciously try to pick out the star san taste and make a big deal of my screw up. Since this beer is so subtle, any off flavors can kill it.
BTW, I read somewhere that star san may either float on top or sink to the bottom....anything to this or just idle talk?