I just discoverd this researching an ear problem that has nothing to do with the pool, but I thought people here would be interested:
"Generally, outer ear infections are caused by a bacterial infection of the skin of the ear canal, although occasion ally it may be due to a fungus or yeast.
The skin can become so swollen that the ear canal closes, causing temporary deafness, and there can be some discharge from the ear. It occurs commonly in people who
suffer from skin problems such as eczema, psoriasis or dermatitis but also in people with narrow ear canals or who swim a great deal.
One of the most common causes of this condition is swimming in pools which have not been maintained to a high standard or have a higher percentage of
chlorine in the water than is advisable."
http://www.deafnessresearch.org.uk/fact ... ctions.pdf