So I forgot to take a starting gravity on a Kolsch I brewed up. Went to my local home brew store and asked if there was anything I could use to get the ABV% on it and they told me to try a Minometer. Will this give a good estimation or no? Any input would be appreciated.
Was it an extract recipe? If so, as long as you hit the correct volume in your fermenter, you can just assume you hit whatever OG your recipe said you would hit. You can't really miss by more than a point or two with extract.