[meyer]

The chlorine would kill any sperm.

that's assuming that they used chlorine.

[Greysard]

that's assuming that they used chlorine

Without chlorine the pool becomes an algae swamp in just a couple of days. Algae will stain the walls of the pool, and the water will smell bad. It's much cheaper to add chlorine, especially when one pool services hundreds of guests.

[Neidermeyer]

that’s assuming that they used chlorine.
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bromine would work the same as chlorine .. if this hotel is oceanside they used to just pump filtered ocean water into the pools (think 1920’s thru 50’s ... they still do that on ocean liners), there are some other exotic sanitizers that are almost never used because of the cost...

this story is simply not believable.