One side wall of my pool is formed of natural stone and concrete (see picture attached, taken while empty). I don't lose water, so it must be pretty well-sealed and watertight. I'm considering switching from liquid chlorine to SWG. Should I worry about corrosion? I'm not worried about the aesthetics of minor surface damage either above or below the waterline. But could I experience more serious damage and/or difficulties with maintaining water quality?
Many thanks in advance for any advice.