Originally Posted by emart85
Also, I seem to have heard that these refractometers are not good for FG readings b/c of the ethanol. Is this true? Is there some sort of adjustment you can make to the refrac reading to get a true FG?
In case you can't tell, I'm not 100% confident in my traditional hydrometer... Any input would be appreciated! Thanks!
Yes, once fermentation has started alcohol skews the reading. There are conversions out there, but I"ve never found one that is accurate. Others have found some that work for them.
It can tell you when beer is done, but not the actual FG. For example, if the brix is 6.4 three days in a row, that means the beer is finished. It does NOT mean the FG is 1.025, though! It just means the beer is finished. Then a hydrometer can tell you the actual FG.