I'm making an ESB that calls for
Williamette .5 60 min
Tettnang .5 30 min
Williamette .5 20 min
Tettnang .5 5 min
Unfortunately, because of the low alpha acid in the Williamette, my IBU comes out way low (under 19) with the .5 oz at 60 min, and I don't have any more.
I have Saaz, hallertauer, and Fuggles that I could add. I'm thinking the Fuggles would be the best and probably adding a half oz of it at 60 is a better option than making a not-bitter ESB.
What do you think?