We have an outdoor/in-ground pool, chlorine based and experience the coughing anytime splashing takes place, which is almost all of the time.
This started last season, the third since the pool was built. I believe it is the CYA (150 reading) and dont know how to lower it besides draining 50% of the volume. Suggestions? other readings are: FC 1.5 CC 3, hardness 100. I've owned inground pools for almost 15 years and never had this puzzling problem.