The drinking water at our lake comes from surrounding wells. This water is characterized by the presence of what I hear called iron bacteria. This element in the water poses no risk to humans consuming it, however, if left for a week or so in your fresh water holding tank, it causes the water to take on an objectionable odor/flavor. We overcome the problem by regularly draining/refilling the tank each weekend and occassionally flushing the system with chlorine. I am interested in knowing if there is any water treatment we could use that would allow us to leave water in the holding tank week to week without the water becoming tainted.