Hey guys, first post here. So this was an all grain hefeweizen that I added some blueberry extract to. It was fine in secondary for about a week, but about 5 days after I added the blueberry extract this showed up. The only thing that touched the beer(aside from the extract) was a thief which was covered in star san foam. I added the extract straight from the bottle, and in retrospect maybe I should have sanitized it some how.
Sorry about the picture quality, but it's basically a white foam with hard white dome shaped bubbles on top. Does anyone have any idea what it is? More importantly, I tasted it and it seems fine. Am I ok to go ahead and try and rack from underneath the film and bottle it?