I try to advise against using carbon based sources for raising or lowering pH. In small amounts baking soda and acetic acid are fine. But I would never recommend using carbon based additives for pH on a large scale in reservoirs. Carbon creates solids and sludge.

Every water source on earth has a little chloride. Don’t go thinking you need to remove it or that it kills microbes. Chloride is an essential element required by plants. Your plants would die without it.