I'm curious how much new water (not just filtered) is typically added to a swimming pool. What replacement rate would that imply for the pool as a whole? (Time to replace the whole volume of the pool). I'm sure it's different for indoor and outdoor pools, as outdoor will have a lot more evaporation.
The immediate reason for this question is that my eyes hurt this morning after swimming two hours yesterday. I'm sure it has to do with impurities in the water.