there is a direct relationship between pH and KH, so yes, the pH will rise as well.
pH is made up of 2 components, Acids (indirect relationship) and KH (direct relationship). Fish only react to changes in KH, so any changes due to Acids is incidental to the fish health (to the extent that you dont overdose; i.e. too much co2 will sufficate the fish). And small changes in KH, regardless of how it affects pH, will also not affect the fish health. So if you raise KH by 2d over a 2 day period, there is no need to get stressed about impact on pH and start adding salts, etc, to aid in fish stress relief.
Keep us updated!
450g Planted Discus Tank - Work in Process!