I actually used gallon spring water from the grocery store this past time. I have a well and have used well water in the past. Tried a pumpkin, Belgian Ale, and now a brown ale and all seem to have the same unpleasant medicine taste, with the same color. I am thinking about how well I sanitized my primary bucket...didn't really scrub it with anything, just poured the sanitizer in and let it sit for a while. Also, I have been keeping the fermenter in the same room each time, with the temperature being around 72F. Maybe the temperature is too high?