Why does my hair look so amazing after swimming in a pool?

I have a curly perm and really oily hair which is super dry and damaged at the ends. I have to use copious amounts of leave-in conditioner to keep the frizz at bay and lock my curls together and shampoo my scalp every single day to get rid of the oily look on my scalp. Whenever I go to the pool, though, my hair dries perfect and I don't shower after, add product or scrunch or do anything. (If I were to do nothing after a normal shower my curls would be limp, hair dry and frizzy) The curls are softer than they've ever been, lustrous, the ringlets are tighter and perfect, there's no oil at all and no frizz. I don't know if it's chlorine or salt or whatever, but I'd love to know how to repeat the effect without a pool.