Ben
If I may put my 2 cents in here.
I also posted in the other forum you mentioned. Most pathogens can live in non chlorinated water. The levels of suggested chlorine allow for rapid kill times. This becomes important if an infected person enters your pool to prevent the spread of the infection. It is even more important of you have a person with a lower immunity. Children under the age of 3 to 5 are at higher risk due to an undeveloped immune system. Some thing that will give an adult a good case of gut cramps could in essence kill a child.
With the emergence of antibiotic resistant pathogens we are now seeing in the lab total kill of these pathogens is not optional.

I am not as concerned about the growth of algae in my pool. The appearance is a small part of the reason I feel the levels of chlorine should be kept levels mentioned in the best guess chart. I have said it once and will again if you have algae it’s the least of your problems. You may have a killer in your pool as well hiding in the algae.

I tend to weigh all decisions concerning the health of the persons in my house very carefully. I looked at the risk of exposure to chlorine levels in the best guess chart verses exposure to the pathogens that can be found in the pool environment. I feel that the exposure to chlorine levels given the best guess chart are lower risk than exposure to pathogens.

Bottom line is that I will tinker with my computer, I will tinker with my truck, I will even tinker with my toys , but I will not tinker with my family’s health.
Steve