I can see only in rare cases where the chlorine in a pool could combine with other chemistry to form a compound that may cause depletion of the ozone layer. I also think the amounts would be so small that it would have little impact. I think it is another round of chem. freaks trying to scare people.
As for Richards’s tornadol….If a tornado rips through my back yard getting my pool, the ozone layer will be the last thing on my mind.
Steve