I live in an area where the water is alkaline. The tap water is treated by the city. What chemicals the city uses I do not know. Because alkalinity, or the degree of alkalinity, is so important to consistent development, I use "distilled water" from the big box store. I am wondering if the use of a reverse osmosis apparatus to treat the tap water would provide water with consistent alkalinity. In other words, if we assume the alkalinity of the tap water fluctuates, would treatment of that tap water by reverse osmosis provide water of uniform alkalinity?