I brewed a Belgian style Pale Ale and after 2 weeks primary & two weeks secondary, I kegged into a new to me keg. At kegging, the beer tasted wonderful, smooth & with a delicate fruit flavor.
After a week in the keg, a sample came out with a sharp metallic taste 7 no fruitiness.
Now, two weeks into the keg, there is less of a metallic taste, and it decreased over the course of the beer.
I bought this keg used & it was quite dirty. It has been disassembled, soaked in hot PBW twice, scrubbed & rinsed. I also soaked in Star San.
Any ideas what could cause the change in flavor from the time of kegging? None of my other kegged beers have had this.
I plan to let the beer continue to sit.