You need a special license/permit thing to store chlorine and acid, and if they ever leak and mix together, you'll be in huge trouble.

Chlorinators last me less than 5 years.  

One other thing worth mentioning that I just thought of is that the polybutylene pipes degrade due to the chlorine that is added by the city plants.

Heavy sodium hypochlorite will kill any mold or mildew spores out there, as chlorine kills virtually anything that it comes into contact with (some protozoa and cysts can escape in water).

The smell is a strong mix of chlorine and oranges , much better than before . 

And don’t “clean” it from a surface of any porosity with chlorine bleach and expect it not to return (like this already has).

If letting the water run for long periods of time didn't cure it, assuming your municipal supply isn't chlorinated enough, maybe you can open up a section of pex to get bleach in there?

polybutelene pipes from the 70s to 90s deteriorate from chlorinated water and sometimes break without warning.....so It sounds like they're in the walls.

As a property owner of the well, the water for use on the lawn is one thing, for use in a pool where the water is could be ingested is another,, I'm not sure what would happen if the well water became contaminated, but it's a possibility,, Yes the chlorine in the pool would kick in but not till the clorinator is activated.

Here are the splashy additions you shouldn’t do:Swimming pool: Your home’s crown jewel is an eyesore in the winter, needs constant chlorine monitoring in the summer and usually needs to be closed in by a fence for safety.