I'm the founder ... and client ... of that institution!
We've had that rotten egg stench in our water for years. The only thing I've found that makes it go away is the filter in our fridge ... or a gallon or so of bleach down the well - don't laugh - I dumped TWO gallons down there once. DON'T do that!
Wife was pissed when I ruined most of her clothes on that one ... and changed her hair color slightly ...
That was extreme, but it got rid of the stench for a long time. It has come back, but it's nowhere near at the level it was before.
Drinking stinky water just sucks, so that was a nice feature of the fridge that I thought I didn't need when looking, back in '08.
I've got an Ecowater softener unit, plus a Big Blue 20" sediment filter ... and neither one helped the smell for long. I gave up, as pursing that rabbit hole, as it looked like it was going to cost us a fortune. As long as I'm not drinking it, I could care less about the smell. If visitors don't like it, well, you know where they can go with their opinions! : D
Yeah, I guess your supposed to clean that resin bed every so often. My unit is 10 years old, and the only thing I did was completely tear it down and clean everything with bleach, right around the same time I poisoned my well with the stuff.
What can I say ... I like to use napalm to start fires ...