I made a batch of light pale ale today. some of my past batches have had a slight clove/chlorine flavor. So today before the boil I added one campden tab to the tap water. My only concern is that this batch is showing no signs of life after 8 hours,,,,every other batch I have made with safeale s-05 has been bubbling away after a few hours. Can campden tabs kill yeast after they boil??