Originally Posted by cheesehed007
Maybe this is where I went wrong. I did my first brew 10 days ago. I didn't know to mix things up after I chilled everything down. Racked it to my carboy, took a SG reading and it read low. 1.026. Figured I was reading mostly water and pitched my yeast (s 05) didn't start fermenting till later the next day 24 hrs at least. Just took my first FG reading and it was 1.012. Target is to be 1.015-1.018. Took a little tast and it had a sour taste. I made a Brewers Best Imperial Blonde Ale. The color s dark, not a blonde.. Thoughts. Could not mixing it up good before I pitched course the low readings?? Thanks for any and all help. Cheers!
Not getting a good mix is typical in all extract beer so that is why your gravity reading was off.
Aeration is important because yeast need the O2 for the initial growth phase. This is why your fermentation was delayed.
As for sour, that is more a sign of infection than poor aeration, are you sure you taste sour and not something else? How did you sanitize everything and what product did you use?