To remove some discoloring/staining of my white plaster, I recently did an acid wash. Added muriatic acid to the pool, and brushed pool daily for 4 days. Then added baking soda to bring pH and TA back into spec. CH was then at about 650 ppm, so I drained some water out of the pool and refilled. CH is now at 500 ppm. Bringing CH back down to 400 (or 350) would require even more draining.
Question - can I reasonable live with this (500 ppm) for now? Will it gradually go down with rain water dilution, etc? Are there any major downsides to this - other than some possible scaling to the tile at the water line (which may require scrubbing)? Or do I really need to bite the bullet and drain even more water out of the pool?