I brewed my first all grain Imperial IPA based on the recipe found here by TwoHeadsBrewing (thanks!!). Everything is going great but have one question concerning carbonation, Ill be naturally carbonating in my cornie but have read that high gravity beers sometimes do not naturally carbonated because of the high alcohol content (this is on its way to 9%); as the yeast are all tired or died off from the toxic environment. To help over come this should I add a package of US -05 in the bottling bucket to assure complete carbonation? Or can I count on my current yeast to do the job (pitched with two packets of US-05)