What do you use for your extract brewing water and why? I've had a string of bad batches this summer and am leaning towards blaming my use of ro/ filtered city water from a machine at the local health store. Previous batches have used bottled spring, distilled, and "purified drinking water" - most using a mixture of spring and distilled. Problem I'm having is yeasty- nasty tasting beer. These are safeale 04 and 05 beers...lightly hopped and light flavored beers (cerveza, light american, and a Mexican Vienna style. - all as ales). .is it the water or just the yeast?