I used to swim a lot until I started developing ear and nose infections from the wet environment. Now, if I swim more than once a week I get a blocked sinus. Th

I used to swim a lot until I started developing ear and nose infections from the wet environment. Now, if I swim more than once a week I get a blocked sinus. This happens more with chlorinated swimming pools, but I think O3 treated ones are not great for your health either. Running on the other hand doesn't seem to give me trouble.