Fixing efficiency by freezing
 

I screwed up my efficiency by a couple points during my last brew day. I forgot to watch my ph and added about a gallon of extra water to a 5 gallon batch I didn't have time to boil off the extra due to something coming up. Anyways I was thinking of putting my ipa in a brewpot overnight in the freezer to make an EisenIPA. Anyone have suggestions short or blanketing the brewpot with CO2 to reduce oxidation? Ive never attempted anything like this before just heard about people doing it. Any suggestions would be most helpful.

So were you a couple points off or a gallon off?

Either way, I think freezing to readjust ABV is too much like work. Drink the beer for what it is and move on.

Boil and add some DME to make up the gravity, dry hop to give more hop aroma.

+1, unless you feel like trying a very daring experiment with subpar equipment.