I just back into brewing after a 10 year break and I remember my first batch. I pitched a dry yeast packet into the cooled wort and got great fermentation but the brew had a slight after taste that I never noticed using liquid yeasts. I must admit that I did not hydrate the dry yeast packet, I just pitched into the wort from the packet. I wonder if this gave the brew an off taste? I remember that first brew having a slight "chalky" or "powdery" after taste. The reason why I ask is I have two packets of dry yeast from John Bull kits. I'm thinking about using it but I really don't want that "chalky" taste in my brew. Deos anyone know what I'm talking about?